@tool extends EditorInspectorPlugin const SLOT_SCENE:= preload("res://addons/reedscene/act/StateDrapSlot.tscn") func _can_handle(object) -> bool: return object is ActManager func _parse_begin(object) -> void: var root := VBoxContainer.new() var slot := SLOT_SCENE.instantiate() root.add_child(slot) add_custom_control(root)