private void removeHandler( final BaseHtmlElement elem, final EventType eventType, final IJsFunc handler, final EventHandlerContainer container) { if (handler == null) { return; } List<EventsToHandlerPair> pairs = container.getElements().get(elem); DapEventHandlerAdapter adapter; if (pairs == null) { return; } for (EventsToHandlerPair pair : pairs) { if (pair.getEventType() != eventType) { continue; } if (!(pair.getHandler() instanceof DapEventHandlerAdapter)) { continue; } adapter = (DapEventHandlerAdapter) pair.getHandler(); if (adapter == null || adapter.getJsFunc() != handler) { continue; } pairs.remove(pair); return; } }