SELECTION_EVENTS
Events that a Selection can fire.
EVENT_EDGE_UPDATED | EVENT_DATA_LOAD_END | EVENT_DATA_LOAD_START | EVENT_NODE_UPDATED | EVENT_GRAPH_CLEAR_START | EVENT_GROUP_UPDATED | EVENT_PORT_UPDATED | EVENT_EDGE_TARGET_CHANGED | EVENT_EDGE_SOURCE_CHANGED | EVENT_EDGE_REMOVED | EVENT_EDGE_ADDED | EVENT_GROUP_REMOVED | EVENT_NODE_REMOVED | EVENT_GROUP_ADDED | EVENT_NODE_ADDED