Would be useful for distinguishing these from regular "data graphics".

methods:

• get_selected_indices()
• get_selected_index()
• get_selected_data()
• _get_source()
• _add_plot_area_hook()
• _move_start()
• get_move_vector() - base implementation
• _move() - decorated by @block_controller, uses get_move_vector()
• _move_graphic(delta) - actually moves the graphic and changes selection feature
• _move_end()

attributes:

• _pygfx_event
• _delta

features:

• selection