code: func NewBlockCapability(
  	mode csi.VolumeCapability_AccessMode_Mode) *csi.VolumeCapability {
  
  	return &csi.VolumeCapability{
  		AccessMode: &csi.VolumeCapability_AccessMode{
  			Mode: mode,
  		},
  		AccessType: &csi.VolumeCapability_Block{
  			Block: &csi.VolumeCapability_BlockVolume{},
  		},
  	}
  }
docs: // NewBlockCapability returns a new *csi.VolumeCapability for a
  // volume that is to be accessed as a raw device.