func NewReader(c context.Context, blobKey appengine.BlobKey) Reader {
	return openBlob(c, blobKey)
}
func NewReader(c context.Context, blobKey appengine.BlobKey) Reader {
	return openBlob(c, blobKey)
}
func NewReader ( c context . Context , blobKey appengine . BlobKey ) Reader { return openBlob ( c , blobKey ) }
// NewReader returns a reader for a blob. It always succeeds; if the blob does
// not exist then an error will be reported upon first read.
NewReader returns a reader for a blob . It always succeeds ; if the blob does not exist then an error will be reported upon first read .