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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def get_variations(self):
 """Gets the OpenType font variations for the font options object. See :meth:`set_variations` for details about the string format. :return: the font variations for the font options object. The returned string belongs to the ``options`` and must not be modified. It is valid until either the font options object is destroyed or the font variations in this object is modified with :meth:`set_variations`. *New in cairo 1.16.* *New in cairocffi 0.9.* """

        variations = cairo.cairo_font_options_get_variations(self._pointer)
        if variations != ffi.NULL:
            return ffi.string(variations).decode('utf8', 'replace')