func FromReader(r io.Reader) ReaderSetter {
	return func(fr *Reader) error {
		fr.r = r
		return nil
	}
}
// FromReader specifies the `io.Reader` to use when reading a file.
FromReader specifies the `io.Reader` to use when reading a file.
// FromReader specifies the ` io . Reader ` to use when reading a file .
func FromReader(r io.Reader) ReaderSetter {
	return func(fr *Reader) error {
		fr.r = r
		return nil
	}
}
func FromReader ( r io . Reader ) ReaderSetter { return func ( fr * Reader ) error { fr . r = r return nil } }
FromReader specifies the `io.Reader` to use when reading a file.
FromReader specifies the ` io . Reader ` to use when reading a file .