code: func ApplyUncompressedLayer(dest string, layer io.Reader, options *archive.TarOptions) (int64, error) {
  	return applyLayerHandler(dest, layer, options, false)
  }
docs: // ApplyUncompressedLayer parses a diff in the standard layer format from
  // `layer`, and applies it to the directory `dest`. The stream `layer`
  // can only be uncompressed.
  // Returns the size in bytes of the contents of the layer.