code: func (s *stackV1Beta1) IsColliding(servicesClient corev1.ServiceInterface, st Stack) error {
  	for _, srv := range st.getServices() {
  		if err := verify(servicesClient, st.Name, srv); err != nil {
  			return err
  		}
  	}
  	return nil
  }
docs: // IsColliding verifies that services defined in the stack collides with already deployed services