code: func (rbds *redisBlobDescriptorService) Stat(ctx context.Context, dgst digest.Digest) (distribution.Descriptor, error) {
  	if err := dgst.Validate(); err != nil {
  		return distribution.Descriptor{}, err
  	}
  
  	conn := rbds.pool.Get()
  	defer conn.Close()
  
  	return rbds.stat(ctx, conn, dgst)
  }
docs: // Stat retrieves the descriptor data from the redis hash entry.