code: protected boolean executeEvents(final EventType _eventtype)
          throws EFapsException
      {
          final boolean ret;
          final List<EventDefinition> triggers = this.instance.getType().getEvents(_eventtype);
          if (triggers != null) {
              final Parameter parameter = new Parameter();
              parameter.put(ParameterValues.INSTANCE, getInstance());
              for (final EventDefinition evenDef : triggers) {
                  evenDef.execute(parameter);
              }
              ret = true;
          } else  {
              ret = false;
          }
          return ret;
      }
docs: The method gets all events for the given EventType and executes them in
  the given order. If no events are defined, nothing is done. The method
  return <i>true</i> if a event was found, otherwise <i>false</i>.
  
  @param _eventtype  trigger events to execute
  @return <i>true</i> if a trigger was found and executed, otherwise
  <i>false</i>
  @throws EFapsException on error