code: func (_m *ClusterClient) Step(ctx context.Context, opts ...grpc.CallOption) (orderer.Cluster_StepClient, error) {
  	_va := make([]interface{}, len(opts))
  	for _i := range opts {
  		_va[_i] = opts[_i]
  	}
  	var _ca []interface{}
  	_ca = append(_ca, ctx)
  	_ca = append(_ca, _va...)
  	ret := _m.Called(_ca...)
  
  	var r0 orderer.Cluster_StepClient
  	if rf, ok := ret.Get(0).(func(context.Context, ...grpc.CallOption) orderer.Cluster_StepClient); ok {
  		r0 = rf(ctx, opts...)
  	} else {
  		if ret.Get(0) != nil {
  			r0 = ret.Get(0).(orderer.Cluster_StepClient)
  		}
  	}
  
  	var r1 error
  	if rf, ok := ret.Get(1).(func(context.Context, ...grpc.CallOption) error); ok {
  		r1 = rf(ctx, opts...)
  	} else {
  		r1 = ret.Error(1)
  	}
  
  	return r0, r1
  }
docs: // Step provides a mock function with given fields: ctx, opts