Extends: ESCLocation < Position2D
A simple node extending Position2D with a global ID so that it can be
referenced in ESC Scripts. Movement-based commands like
automatically use an
ESCLocation that is a child of the destination node.
turn_to–which are not movement-based–will ignore child
ESCLocations and refer to the parent node.
func is_class(p_classname: String) -> bool
p_classname: String class to compare against