xNode/Samples~/MathGraph/Nodes/DisplayValue.cs

namespace XNode.Examples.MathNodes {
    
    public class DisplayValue : XNode.Node {
        
        /// <summary> 
        /// Create an input port that only allows a single connection.
        /// The backing value is not important, as we are only interested in the input value.
        /// We are also acceptable of all input types, so any type will do, as long as it is serializable. 
        /// </summary>
        [Input(ShowBackingValue.Never, ConnectionType.Override)] public Anything input;
        
        /// <summary> Get the value currently plugged in to this node </summary>
        public object GetValue() {
            return GetInputValue<object>("input");
        }

        /// <summary> This class is defined for the sole purpose of being serializable </summary>
        [System.Serializable] public class Anything {}
    }
}