code: public boolean contains(Object o) {
  		for (int i = 0; i < events.size(); i++) {
  			try {
  				if (events.get(i).equals(o)) {
  					return true;
  				}
  			} catch (IOException e) {
  				e.printStackTrace();
  			}
  		}
  		return false;
  	}
docs: /*
  (non-Javadoc)
  
  @see java.util.List#contains(java.lang.Object)