docs: def build_event_out(self, event_out):
          """
          Build event out code.
  
          @param event_out: event out object
          @type event_out: lems.model.dynamics.EventOut
  
          @return: Generated event out code
          @rtype: string
          """
  
          event_out_code = ['if "{0}" in self.event_out_callbacks:'.format(event_out.port),
                            '    for c in self.event_out_callbacks[\'{0}\']:'.format(event_out.port),
                            '        c()']
  
          return event_out_code