Get custom fields. Evaluated on 7.12
        :param search: str
        :param start: long Default: 1
        :param limit: int Default: 50
        :return:

def get_custom_fields(self, search=None, start=1, limit=50):
        """
        Get custom fields. Evaluated on 7.12
        :param search: str
        :param start: long Default: 1
        :param limit: int Default: 50
        :return:
        """
        url = 'rest/api/2/customFields'
        params = {}
        if search:
            params['search'] = search
        if start:
            params['startAt'] = start
        if limit:
            params['maxResults'] = limit
        return self.get(url, params=params)