diff --git a/spine-flutter/lib/spine_flutter.dart b/spine-flutter/lib/spine_flutter.dart
index 379a99e62..8006f7b59 100644
--- a/spine-flutter/lib/spine_flutter.dart
+++ b/spine-flutter/lib/spine_flutter.dart
@@ -1080,7 +1080,7 @@ class IkConstraintData extends ConstraintData {
   }
 
   bool getCompress() {
-    return _bindings.spine_ik_constraint_data_get_compress(_data) == -1 ? true : false;
+    return _bindings.spine_ik_constraint_data_get_compress(_data) == -1;
   }
 
   void setCompress(bool compress) {
@@ -1088,7 +1088,7 @@ class IkConstraintData extends ConstraintData {
   }
 
   bool getStretch() {
-    return _bindings.spine_ik_constraint_data_get_stretch(_data) == -1 ? true : false;
+    return _bindings.spine_ik_constraint_data_get_stretch(_data) == -1;
   }
 
   void setStretch(bool stretch) {
@@ -1096,7 +1096,7 @@ class IkConstraintData extends ConstraintData {
   }
 
   bool getUniform() {
-    return _bindings.spine_ik_constraint_data_get_uniform(_data) == -1 ? true : false;
+    return _bindings.spine_ik_constraint_data_get_uniform(_data) == -1;
   }
 
   void setUniform(bool uniform) {
@@ -1120,11 +1120,88 @@ class IkConstraintData extends ConstraintData {
   }
 }
 
-// FIXME
 class IkConstraint {
   final spine_ik_constraint _constraint;
 
   IkConstraint._(this._constraint);
+
+  void update() {
+    _bindings.spine_ik_constraint_update(_constraint);
+  }
+
+  int getOrder() {
+    return _bindings.spine_ik_constraint_get_order(_constraint);
+  }
+
+  IkConstraintData getData() {
+    return IkConstraintData._(_bindings.spine_ik_constraint_get_data(_constraint));
+  }
+
+  List<Bone> getBones() {
+    List<Bone> result = [];
+    final num = _bindings.spine_ik_constraint_get_num_bones(_constraint);
+    final nativeBones = _bindings.spine_ik_constraint_get_bones(_constraint);
+    for (int i = 0; i < num; i++) {
+      result.add(Bone._(nativeBones[i]));
+    }
+    return result;
+  }
+
+  Bone getTarget() {
+    return Bone._(_bindings.spine_ik_constraint_get_target(_constraint));
+  }
+
+  void setTarget(Bone target) {
+    _bindings.spine_ik_constraint_set_target(_constraint, target._bone);
+  }
+
+  int getBendDirection() {
+    return _bindings.spine_ik_constraint_get_bend_direction(_constraint);
+  }
+
+  void setBendDirection(int bendDirection) {
+    _bindings.spine_ik_constraint_set_bend_direction(_constraint, bendDirection);
+  }
+
+  bool getCompress() {
+    return _bindings.spine_ik_constraint_get_compress(_constraint) == -1;
+  }
+
+  void setCompress(bool compress) {
+    _bindings.spine_ik_constraint_set_compress(_constraint, compress ? -1 : 0);
+  }
+
+  bool getStretch() {
+    return _bindings.spine_ik_constraint_get_stretch(_constraint) == -1;
+  }
+
+  void setStretch(bool stretch) {
+    _bindings.spine_ik_constraint_set_stretch(_constraint, stretch ? -1 : 0);
+  }
+
+  double getMix() {
+    return _bindings.spine_ik_constraint_get_mix(_constraint);
+  }
+
+  void setMix(double mix) {
+    _bindings.spine_ik_constraint_set_mix(_constraint, mix);
+  }
+
+  double getSoftness() {
+    return _bindings.spine_ik_constraint_get_softness(_constraint);
+  }
+
+  void setSoftness(double softness) {
+    _bindings.spine_ik_constraint_set_softness(_constraint, softness);
+  }
+
+  bool isActive() {
+    return _bindings.spine_ik_constraint_get_is_active(_constraint) == -1;
+  }
+
+  void setIsActive(bool isActive) {
+    _bindings.spine_ik_constraint_set_is_active(_constraint, isActive ? -1 : 0);
+  }
 }
 
 // FIXME
diff --git a/spine-flutter/lib/spine_flutter_bindings_generated.dart b/spine-flutter/lib/spine_flutter_bindings_generated.dart
index b2876b2c5..8a851eafc 100644
--- a/spine-flutter/lib/spine_flutter_bindings_generated.dart
+++ b/spine-flutter/lib/spine_flutter_bindings_generated.dart
@@ -5066,6 +5066,308 @@ class SpineFlutterBindings {
   late final _spine_ik_constraint_data_set_softness =
       _spine_ik_constraint_data_set_softnessPtr
           .asFunction<void Function(spine_ik_constraint_data, double)>();
+
+  void spine_ik_constraint_update(
+    spine_ik_constraint constraint,
+  ) {
+    return _spine_ik_constraint_update(
+      constraint,
+    );
+  }
+
+  late final _spine_ik_constraint_updatePtr =
+      _lookup<ffi.NativeFunction<ffi.Void Function(spine_ik_constraint)>>(
+          'spine_ik_constraint_update');
+  late final _spine_ik_constraint_update = _spine_ik_constraint_updatePtr
+      .asFunction<void Function(spine_ik_constraint)>();
+
+  int spine_ik_constraint_get_order(
+    spine_ik_constraint constraint,
+  ) {
+    return _spine_ik_constraint_get_order(
+      constraint,
+    );
+  }
+
+  late final _spine_ik_constraint_get_orderPtr =
+      _lookup<ffi.NativeFunction<ffi.Int32 Function(spine_ik_constraint)>>(
+          'spine_ik_constraint_get_order');
+  late final _spine_ik_constraint_get_order = _spine_ik_constraint_get_orderPtr
+      .asFunction<int Function(spine_ik_constraint)>();
+
+  spine_ik_constraint_data spine_ik_constraint_get_data(
+    spine_ik_constraint constraint,
+  ) {
+    return _spine_ik_constraint_get_data(
+      constraint,
+    );
+  }
+
+  late final _spine_ik_constraint_get_dataPtr = _lookup<
+      ffi.NativeFunction<
+          spine_ik_constraint_data Function(
+              spine_ik_constraint)>>('spine_ik_constraint_get_data');
+  late final _spine_ik_constraint_get_data = _spine_ik_constraint_get_dataPtr
+      .asFunction<spine_ik_constraint_data Function(spine_ik_constraint)>();
+
+  int spine_ik_constraint_get_num_bones(
+    spine_ik_constraint constraint,
+  ) {
+    return _spine_ik_constraint_get_num_bones(
+      constraint,
+    );
+  }
+
+  late final _spine_ik_constraint_get_num_bonesPtr =
+      _lookup<ffi.NativeFunction<ffi.Int32 Function(spine_ik_constraint)>>(
+          'spine_ik_constraint_get_num_bones');
+  late final _spine_ik_constraint_get_num_bones =
+      _spine_ik_constraint_get_num_bonesPtr
+          .asFunction<int Function(spine_ik_constraint)>();
+
+  ffi.Pointer<spine_bone> spine_ik_constraint_get_bones(
+    spine_ik_constraint constraint,
+  ) {
+    return _spine_ik_constraint_get_bones(
+      constraint,
+    );
+  }
+
+  late final _spine_ik_constraint_get_bonesPtr = _lookup<
+      ffi.NativeFunction<
+          ffi.Pointer<spine_bone> Function(
+              spine_ik_constraint)>>('spine_ik_constraint_get_bones');
+  late final _spine_ik_constraint_get_bones = _spine_ik_constraint_get_bonesPtr
+      .asFunction<ffi.Pointer<spine_bone> Function(spine_ik_constraint)>();
+
+  spine_bone spine_ik_constraint_get_target(
+    spine_ik_constraint constraint,
+  ) {
+    return _spine_ik_constraint_get_target(
+      constraint,
+    );
+  }
+
+  late final _spine_ik_constraint_get_targetPtr =
+      _lookup<ffi.NativeFunction<spine_bone Function(spine_ik_constraint)>>(
+          'spine_ik_constraint_get_target');
+  late final _spine_ik_constraint_get_target =
+      _spine_ik_constraint_get_targetPtr
+          .asFunction<spine_bone Function(spine_ik_constraint)>();
+
+  void spine_ik_constraint_set_target(
+    spine_ik_constraint constraint,
+    spine_bone target,
+  ) {
+    return _spine_ik_constraint_set_target(
+      constraint,
+      target,
+    );
+  }
+
+  late final _spine_ik_constraint_set_targetPtr = _lookup<
+      ffi.NativeFunction<
+          ffi.Void Function(spine_ik_constraint,
+              spine_bone)>>('spine_ik_constraint_set_target');
+  late final _spine_ik_constraint_set_target =
+      _spine_ik_constraint_set_targetPtr
+          .asFunction<void Function(spine_ik_constraint, spine_bone)>();
+
+  int spine_ik_constraint_get_bend_direction(
+    spine_ik_constraint constraint,
+  ) {
+    return _spine_ik_constraint_get_bend_direction(
+      constraint,
+    );
+  }
+
+  late final _spine_ik_constraint_get_bend_directionPtr =
+      _lookup<ffi.NativeFunction<ffi.Int32 Function(spine_ik_constraint)>>(
+          'spine_ik_constraint_get_bend_direction');
+  late final _spine_ik_constraint_get_bend_direction =
+      _spine_ik_constraint_get_bend_directionPtr
+          .asFunction<int Function(spine_ik_constraint)>();
+
+  void spine_ik_constraint_set_bend_direction(
+    spine_ik_constraint constraint,
+    int bendDirection,
+  ) {
+    return _spine_ik_constraint_set_bend_direction(
+      constraint,
+      bendDirection,
+    );
+  }
+
+  late final _spine_ik_constraint_set_bend_directionPtr = _lookup<
+      ffi.NativeFunction<
+          ffi.Void Function(spine_ik_constraint,
+              ffi.Int32)>>('spine_ik_constraint_set_bend_direction');
+  late final _spine_ik_constraint_set_bend_direction =
+      _spine_ik_constraint_set_bend_directionPtr
+          .asFunction<void Function(spine_ik_constraint, int)>();
+
+  int spine_ik_constraint_get_compress(
+    spine_ik_constraint constraint,
+  ) {
+    return _spine_ik_constraint_get_compress(
+      constraint,
+    );
+  }
+
+  late final _spine_ik_constraint_get_compressPtr =
+      _lookup<ffi.NativeFunction<ffi.Int32 Function(spine_ik_constraint)>>(
+          'spine_ik_constraint_get_compress');
+  late final _spine_ik_constraint_get_compress =
+      _spine_ik_constraint_get_compressPtr
+          .asFunction<int Function(spine_ik_constraint)>();
+
+  void spine_ik_constraint_set_compress(
+    spine_ik_constraint constraint,
+    int compress,
+  ) {
+    return _spine_ik_constraint_set_compress(
+      constraint,
+      compress,
+    );
+  }
+
+  late final _spine_ik_constraint_set_compressPtr = _lookup<
+      ffi.NativeFunction<
+          ffi.Void Function(spine_ik_constraint,
+              ffi.Int32)>>('spine_ik_constraint_set_compress');
+  late final _spine_ik_constraint_set_compress =
+      _spine_ik_constraint_set_compressPtr
+          .asFunction<void Function(spine_ik_constraint, int)>();
+
+  int spine_ik_constraint_get_stretch(
+    spine_ik_constraint constraint,
+  ) {
+    return _spine_ik_constraint_get_stretch(
+      constraint,
+    );
+  }
+
+  late final _spine_ik_constraint_get_stretchPtr =
+      _lookup<ffi.NativeFunction<ffi.Int32 Function(spine_ik_constraint)>>(
+          'spine_ik_constraint_get_stretch');
+  late final _spine_ik_constraint_get_stretch =
+      _spine_ik_constraint_get_stretchPtr
+          .asFunction<int Function(spine_ik_constraint)>();
+
+  void spine_ik_constraint_set_stretch(
+    spine_ik_constraint constraint,
+    int stretch,
+  ) {
+    return _spine_ik_constraint_set_stretch(
+      constraint,
+      stretch,
+    );
+  }
+
+  late final _spine_ik_constraint_set_stretchPtr = _lookup<
+      ffi.NativeFunction<
+          ffi.Void Function(spine_ik_constraint,
+              ffi.Int32)>>('spine_ik_constraint_set_stretch');
+  late final _spine_ik_constraint_set_stretch =
+      _spine_ik_constraint_set_stretchPtr
+          .asFunction<void Function(spine_ik_constraint, int)>();
+
+  double spine_ik_constraint_get_mix(
+    spine_ik_constraint constraint,
+  ) {
+    return _spine_ik_constraint_get_mix(
+      constraint,
+    );
+  }
+
+  late final _spine_ik_constraint_get_mixPtr =
+      _lookup<ffi.NativeFunction<ffi.Float Function(spine_ik_constraint)>>(
+          'spine_ik_constraint_get_mix');
+  late final _spine_ik_constraint_get_mix = _spine_ik_constraint_get_mixPtr
+      .asFunction<double Function(spine_ik_constraint)>();
+
+  void spine_ik_constraint_set_mix(
+    spine_ik_constraint constraint,
+    double mix,
+  ) {
+    return _spine_ik_constraint_set_mix(
+      constraint,
+      mix,
+    );
+  }
+
+  late final _spine_ik_constraint_set_mixPtr = _lookup<
+      ffi.NativeFunction<
+          ffi.Void Function(
+              spine_ik_constraint, ffi.Float)>>('spine_ik_constraint_set_mix');
+  late final _spine_ik_constraint_set_mix = _spine_ik_constraint_set_mixPtr
+      .asFunction<void Function(spine_ik_constraint, double)>();
+
+  double spine_ik_constraint_get_softness(
+    spine_ik_constraint constraint,
+  ) {
+    return _spine_ik_constraint_get_softness(
+      constraint,
+    );
+  }
+
+  late final _spine_ik_constraint_get_softnessPtr =
+      _lookup<ffi.NativeFunction<ffi.Float Function(spine_ik_constraint)>>(
+          'spine_ik_constraint_get_softness');
+  late final _spine_ik_constraint_get_softness =
+      _spine_ik_constraint_get_softnessPtr
+          .asFunction<double Function(spine_ik_constraint)>();
+
+  void spine_ik_constraint_set_softness(
+    spine_ik_constraint constraint,
+    double softness,
+  ) {
+    return _spine_ik_constraint_set_softness(
+      constraint,
+      softness,
+    );
+  }
+
+  late final _spine_ik_constraint_set_softnessPtr = _lookup<
+      ffi.NativeFunction<
+          ffi.Void Function(spine_ik_constraint,
+              ffi.Float)>>('spine_ik_constraint_set_softness');
+  late final _spine_ik_constraint_set_softness =
+      _spine_ik_constraint_set_softnessPtr
+          .asFunction<void Function(spine_ik_constraint, double)>();
+
+  int spine_ik_constraint_get_is_active(
+    spine_ik_constraint constraint,
+  ) {
+    return _spine_ik_constraint_get_is_active(
+      constraint,
+    );
+  }
+
+  late final _spine_ik_constraint_get_is_activePtr =
+      _lookup<ffi.NativeFunction<ffi.Int32 Function(spine_ik_constraint)>>(
+          'spine_ik_constraint_get_is_active');
+  late final _spine_ik_constraint_get_is_active =
+      _spine_ik_constraint_get_is_activePtr
+          .asFunction<int Function(spine_ik_constraint)>();
+
+  void spine_ik_constraint_set_is_active(
+    spine_ik_constraint constraint,
+    int isActive,
+  ) {
+    return _spine_ik_constraint_set_is_active(
+      constraint,
+      isActive,
+    );
+  }
+
+  late final _spine_ik_constraint_set_is_activePtr = _lookup<
+      ffi.NativeFunction<
+          ffi.Void Function(spine_ik_constraint,
+              ffi.Int32)>>('spine_ik_constraint_set_is_active');
+  late final _spine_ik_constraint_set_is_active =
+      _spine_ik_constraint_set_is_activePtr
+          .asFunction<void Function(spine_ik_constraint, int)>();
 }
 
 class spine_atlas extends ffi.Struct {
diff --git a/spine-flutter/src/spine_flutter.cpp b/spine-flutter/src/spine_flutter.cpp
index 55a7967f2..c67cb2d16 100644
--- a/spine-flutter/src/spine_flutter.cpp
+++ b/spine-flutter/src/spine_flutter.cpp
@@ -2185,3 +2185,117 @@ FFI_PLUGIN_EXPORT void spine_ik_constraint_data_set_softness(spine_ik_constraint
     _data->setSoftness(softness);
 }
 
+// IKConstraint
+FFI_PLUGIN_EXPORT void spine_ik_constraint_update(spine_ik_constraint constraint) {
+    if (constraint == nullptr) return;
+    IkConstraint *_constraint = (IkConstraint*)constraint;
+    _constraint->update();
+}
+
+FFI_PLUGIN_EXPORT int spine_ik_constraint_get_order(spine_ik_constraint constraint) {
+    if (constraint == nullptr) return 0;
+    IkConstraint *_constraint = (IkConstraint*)constraint;
+    return _constraint->getOrder();
+}
+
+FFI_PLUGIN_EXPORT spine_ik_constraint_data spine_ik_constraint_get_data(spine_ik_constraint constraint) {
+    if (constraint == nullptr) return nullptr;
+    IkConstraint *_constraint = (IkConstraint*)constraint;
+    return (spine_ik_constraint_data)&_constraint->getData();
+}
+
+FFI_PLUGIN_EXPORT int spine_ik_constraint_get_num_bones(spine_ik_constraint constraint) {
+    if (constraint == nullptr) return 0;
+    IkConstraint *_constraint = (IkConstraint*)constraint;
+    return (int)_constraint->getBones().size();
+}
+
+FFI_PLUGIN_EXPORT spine_bone* spine_ik_constraint_get_bones(spine_ik_constraint constraint) {
+    if (constraint == nullptr) return nullptr;
+    IkConstraint *_constraint = (IkConstraint*)constraint;
+    return (spine_bone*)_constraint->getBones().buffer();
+}
+
+FFI_PLUGIN_EXPORT spine_bone spine_ik_constraint_get_target(spine_ik_constraint constraint) {
+    if (constraint == nullptr) return nullptr;
+    IkConstraint *_constraint = (IkConstraint*)constraint;
+    return (spine_bone)_constraint->getTarget();
+}
+
+FFI_PLUGIN_EXPORT void spine_ik_constraint_set_target(spine_ik_constraint constraint, spine_bone target) {
+    if (constraint == nullptr) return;
+    IkConstraint *_constraint = (IkConstraint*)constraint;
+    _constraint->setTarget((Bone*)target);
+}
+
+FFI_PLUGIN_EXPORT int spine_ik_constraint_get_bend_direction(spine_ik_constraint constraint) {
+    if (constraint == nullptr) return 1;
+    IkConstraint *_constraint = (IkConstraint*)constraint;
+    return _constraint->getBendDirection();
+}
+
+FFI_PLUGIN_EXPORT void spine_ik_constraint_set_bend_direction(spine_ik_constraint constraint, int bendDirection) {
+    if (constraint == nullptr) return;
+    IkConstraint *_constraint = (IkConstraint*)constraint;
+    _constraint->setBendDirection(bendDirection);
+}
+
+FFI_PLUGIN_EXPORT int spine_ik_constraint_get_compress(spine_ik_constraint constraint) {
+    if (constraint == nullptr) return 0;
+    IkConstraint *_constraint = (IkConstraint*)constraint;
+    return _constraint->getCompress() ? -1 : 0;
+}
+
+FFI_PLUGIN_EXPORT void spine_ik_constraint_set_compress(spine_ik_constraint constraint, int compress) {
+    if (constraint == nullptr) return;
+    IkConstraint *_constraint = (IkConstraint*)constraint;
+    _constraint->setCompress(compress);
+}
+
+FFI_PLUGIN_EXPORT int spine_ik_constraint_get_stretch(spine_ik_constraint constraint) {
+    if (constraint == nullptr) return 0;
+    IkConstraint *_constraint = (IkConstraint*)constraint;
+    return _constraint->getStretch() ? -1 : 0;
+}
+
+FFI_PLUGIN_EXPORT void spine_ik_constraint_set_stretch(spine_ik_constraint constraint, int stretch) {
+    if (constraint == nullptr) return;
+    IkConstraint *_constraint = (IkConstraint*)constraint;
+    _constraint->setStretch(stretch);
+}
+
+FFI_PLUGIN_EXPORT float spine_ik_constraint_get_mix(spine_ik_constraint constraint) {
+    if (constraint == nullptr) return 0;
+    IkConstraint *_constraint = (IkConstraint*)constraint;
+    return _constraint->getMix();
+}
+
+FFI_PLUGIN_EXPORT void spine_ik_constraint_set_mix(spine_ik_constraint constraint, float mix) {
+    if (constraint == nullptr) return;
+    IkConstraint *_constraint = (IkConstraint*)constraint;
+    _constraint->setMix(mix);
+}
+
+FFI_PLUGIN_EXPORT float spine_ik_constraint_get_softness(spine_ik_constraint constraint) {
+    if (constraint == nullptr) return 0;
+    IkConstraint *_constraint = (IkConstraint*)constraint;
+    return _constraint->getSoftness();
+}
+
+FFI_PLUGIN_EXPORT void spine_ik_constraint_set_softness(spine_ik_constraint constraint, float softness) {
+    if (constraint == nullptr) return;
+    IkConstraint *_constraint = (IkConstraint*)constraint;
+    _constraint->setSoftness(softness);
+}
+
+FFI_PLUGIN_EXPORT int spine_ik_constraint_get_is_active(spine_ik_constraint constraint) {
+    if (constraint == nullptr) return 0;
+    IkConstraint *_constraint = (IkConstraint*)constraint;
+    return _constraint->isActive() ? -1 : 0;
+}
+
+FFI_PLUGIN_EXPORT void spine_ik_constraint_set_is_active(spine_ik_constraint constraint, int isActive) {
+    if (constraint == nullptr) return;
+    IkConstraint *_constraint = (IkConstraint*)constraint;
+    _constraint->setActive(isActive);
+}
diff --git a/spine-flutter/src/spine_flutter.h b/spine-flutter/src/spine_flutter.h
index 3a6e11295..e4557d1db 100644
--- a/spine-flutter/src/spine_flutter.h
+++ b/spine-flutter/src/spine_flutter.h
@@ -481,4 +481,24 @@ FFI_PLUGIN_EXPORT void spine_ik_constraint_data_set_uniform(spine_ik_constraint_
 FFI_PLUGIN_EXPORT float spine_ik_constraint_data_get_mix(spine_ik_constraint_data data);
 FFI_PLUGIN_EXPORT void spine_ik_constraint_data_set_mix(spine_ik_constraint_data data, float mix);
 FFI_PLUGIN_EXPORT float spine_ik_constraint_data_get_softness(spine_ik_constraint_data data);
-FFI_PLUGIN_EXPORT void spine_ik_constraint_data_set_softness(spine_ik_constraint_data data, float softness);
\ No newline at end of file
+FFI_PLUGIN_EXPORT void spine_ik_constraint_data_set_softness(spine_ik_constraint_data data, float softness);
+
+FFI_PLUGIN_EXPORT void spine_ik_constraint_update(spine_ik_constraint constraint);
+FFI_PLUGIN_EXPORT int spine_ik_constraint_get_order(spine_ik_constraint constraint);
+FFI_PLUGIN_EXPORT spine_ik_constraint_data spine_ik_constraint_get_data(spine_ik_constraint constraint);
+FFI_PLUGIN_EXPORT int spine_ik_constraint_get_num_bones(spine_ik_constraint constraint);
+FFI_PLUGIN_EXPORT spine_bone* spine_ik_constraint_get_bones(spine_ik_constraint constraint);
+FFI_PLUGIN_EXPORT spine_bone spine_ik_constraint_get_target(spine_ik_constraint constraint);
+FFI_PLUGIN_EXPORT void spine_ik_constraint_set_target(spine_ik_constraint constraint, spine_bone target);
+FFI_PLUGIN_EXPORT int spine_ik_constraint_get_bend_direction(spine_ik_constraint constraint);
+FFI_PLUGIN_EXPORT void spine_ik_constraint_set_bend_direction(spine_ik_constraint constraint, int bendDirection);
+FFI_PLUGIN_EXPORT int spine_ik_constraint_get_compress(spine_ik_constraint constraint);
+FFI_PLUGIN_EXPORT void spine_ik_constraint_set_compress(spine_ik_constraint constraint, int compress);
+FFI_PLUGIN_EXPORT int spine_ik_constraint_get_stretch(spine_ik_constraint constraint);
+FFI_PLUGIN_EXPORT void spine_ik_constraint_set_stretch(spine_ik_constraint constraint, int stretch);
+FFI_PLUGIN_EXPORT float spine_ik_constraint_get_mix(spine_ik_constraint constraint);
+FFI_PLUGIN_EXPORT void spine_ik_constraint_set_mix(spine_ik_constraint constraint, float mix);
+FFI_PLUGIN_EXPORT float spine_ik_constraint_get_softness(spine_ik_constraint constraint);
+FFI_PLUGIN_EXPORT void spine_ik_constraint_set_softness(spine_ik_constraint constraint, float softness);
+FFI_PLUGIN_EXPORT int spine_ik_constraint_get_is_active(spine_ik_constraint constraint);
+FFI_PLUGIN_EXPORT void spine_ik_constraint_set_is_active(spine_ik_constraint constraint, int isActive);
\ No newline at end of file