code: func (m *MockServiceDiscovery) GetServersByType(serverType string) (map[string]*cluster.Server, error) {
  	ret := m.ctrl.Call(m, "GetServersByType", serverType)
  	ret0, _ := ret[0].(map[string]*cluster.Server)
  	ret1, _ := ret[1].(error)
  	return ret0, ret1
  }
docs: // GetServersByType mocks base method