def METHOD_NAME(self):
    """Checks if the long string fields are reST-compliant."""
    data = self.distribution.get_long_description()
    if not isinstance(data, unicode):
        data = data.decode(PKG_INFO_ENCODING)
    for warning in self._check_rst_data(data):
        line = warning[-1].get('line')
        if line is None:
            warning = warning[1]
        else:
            warning = '%s (line %s)' % (warning[1], line)
        self.warn(warning)