code: public boolean removeStickyEvent(final Object event, final String eventId) {
          synchronized (stickyEventMap) {
              final String val = stickyEventMap.get(event);
  
              if (N.equals(val, eventId) && (val != null || stickyEventMap.containsKey(event))) {
                  stickyEventMap.remove(event);
  
                  this.mapOfStickyEvent = null;
                  return true;
              }
          }
  
          return false;
      }
docs: Remove the sticky event posted with the specified <code>eventId</code>.
  
  @param event
  @param eventId
  @return