Node.[Input Output]

public [Input(ShowBackingValue backingValue, ConnectionType connectionType, bool instancePortList = false)];
public [Output(ShowBackingValue backingValue, ConnectionType connectionType, bool instancePortList = false)];

Parameters	Summary
backingValue	When to show the field inspector associated with this NodePort.
connectionType	Should we allow multiple connections?
instancePortList	Display a reoderable list of ports, optionally using array data as backing values

Assign an input or output port to a public or private serialized field.

public class ExampleNode : Node{
    [Input] public float a;
    [Output] public float b;
}