A node which is part of a [VisualScript]. A node which is part of a [VisualScript]. Not to be confused with [Node], which is a part of a [SceneTree]. Returns the default value of a given port. The default value is used when nothing is connected to the port. Returns the [VisualScript] instance the node is bound to. Notify that the node's ports have changed. Usually used in conjunction with [VisualScriptCustomNode] . Change the default value of a given port. Emitted when the available input/output ports are changed.