'Raw image data. Use `is_png` to determine whether this is an
embedded PNG file (true) or a DIB bitmap (false) and call a
relevant parser, if needed to parse image data further.'

@property
def img(self):

    if hasattr(self, '_m_img'):
        return (self._m_img if hasattr(self, '_m_img') else None)
    _pos = self._io.pos()
    self._io.seek(self.ofs_img)
    self._m_img = self._io.read_bytes(self.len_img)
    self._io.seek(_pos)
    return (self._m_img if hasattr(self, '_m_img') else None)
