@staticmethod
def is_multivalue(field_name):
    """
        Check, if given form field is a multivalue field.

        :param str field_name: Name of the form field.
        :return: ``True``, if the field can contain multiple values, ``False`` otherwise.
        :rtype: bool
        """
    if field_name in ('source_addrs', 'target_addrs', 'host_addrs',
        'source_ports', 'target_ports', 'host_ports', 'source_types',
        'target_types', 'host_types', 'detectors', 'detector_types',
        'categories', 'severities', 'classess', 'protocols', 'groups',
        'inspection_errs'):
        return True
    return False
