<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def dimensions(self):
 """ Dimensions of the image. :rtype: :py:class:`ImageDimensions` """

        return ImageDimensions(self._info.file.width, self._info.file.height)