doMouseUp method
void
doMouseUp()
If there is something found by #findObjectWithContextMenu, call #showContextMenu with that object's GraphObject#contextMenu or the Diagram#contextMenu.
Once a context menu is being shown, if a click occurs on a part of the context menu, call Tool#standardMouseClick. Otherwise if the click occurs elsewhere, just stop this tool. Unlike most tools, the first mouse-up should not stop this tool.
Implementation
void doMouseUp() {
_i4.callMethod(
this,
'doMouseUp',
[],
);
}