code: func (p *priorityPlugin) ValidateInitialization() error {
  	if p.client == nil {
  		return fmt.Errorf("%s requires a client", PluginName)
  	}
  	if p.lister == nil {
  		return fmt.Errorf("%s requires a lister", PluginName)
  	}
  	return nil
  }
docs: // ValidateInitialization implements the InitializationValidator interface.