code: public void addVertexAction(final JsGeometryContextMenuAction action, String title) {
  		delegate.addVertexAction(new GeometryContextMenuAction(title, null) {
  
  			@Override
  			public void onClick(MenuItemClickEvent event) {
  				action.execute(JsGeometryContextMenuRegistry.this);
  
  			}
  		});
  	}
docs: Adds a vertex context menu action.
  
  @param action
  @param title