Editor for [GridMap] nodes. GridMapEditorPlugin provides access to the [GridMap] editor functionality. Deselects any currently selected cells. Returns the [GridMap] node currently edited by the grid map editor. Returns an array of [Vector3i]s with the selected cells' coordinates. Returns the index of the selected [MeshLibrary] item in the grid map editor's palette or [code]-1[/code] if no item is selected. [b]Note:[/b] The indices might not be in the same order as they appear in the editor's interface. Returns the cell coordinate bounds of the current selection. Use [method has_selection] to check if there is an active selection. Returns [code]true[/code] if there are selected cells. Selects the [MeshLibrary] item with the given index in the grid map editor's palette. If a negative index is given, no item will be selected. If a value greater than the last index is given, the last item will be selected. [b]Note:[/b] The indices might not be in the same order as they appear in the editor's interface. Selects the cells inside the given bounds from [param begin] to [param end].