Manages the SceneTree selection in the editor. This object manages the SceneTree selection in the editor. [b]Note:[/b] This class shouldn't be instantiated directly. Instead, access the singleton using [method EditorInterface.get_selection]. Adds a node to the selection. [b]Note:[/b] The newly selected node will not be automatically edited in the inspector. If you want to edit a node, use [method EditorInterface.edit_node]. Clear the selection. Returns the list of selected nodes. Returns the list of top selected nodes only, excluding any children. This is useful for performing transform operations (moving them, rotating, etc.). For example, if there is a node A with a child B and a sibling C, then selecting all three will cause this method to return only A and C. Changing the global transform of A will affect the global transform of B, so there is no need to change B separately. Returns the list of top selected nodes only, excluding any children. This is useful for performing transform operations (moving them, rotating, etc.). See [method get_top_selected_nodes]. Removes a node from the selection. Emitted when the selection changes.