func NewReader(src io.Reader) *Reader {
	r := &Reader{src: src}
	return r
}
func NewReader(src io.Reader) *Reader {
	r := &Reader{src: src}
	return r
}
func NewReader ( src io . Reader ) * Reader { r := & Reader { src : src } return r }
// NewReader returns a new LZ4 frame decoder.
// No access to the underlying io.Reader is performed.
NewReader returns a new LZ4 frame decoder . No access to the underlying io . Reader is performed .