code: func (f *ControllerClient) ControllerGetCapabilities(ctx context.Context, in *csipb.ControllerGetCapabilitiesRequest, opts ...grpc.CallOption) (*csipb.ControllerGetCapabilitiesResponse, error) {
  	if f.nextErr != nil {
  		return nil, f.nextErr
  	}
  
  	if f.nextCapabilities == nil {
  		f.nextCapabilities = []*csipb.ControllerServiceCapability{
  			{
  				Type: &csipb.ControllerServiceCapability_Rpc{
  					Rpc: &csipb.ControllerServiceCapability_RPC{
  						Type: csipb.ControllerServiceCapability_RPC_PUBLISH_UNPUBLISH_VOLUME,
  					},
  				},
  			},
  		}
  	}
  	return &csipb.ControllerGetCapabilitiesResponse{
  		Capabilities: f.nextCapabilities,
  	}, nil
  }
docs: // ControllerGetCapabilities implements csi method