def METHOD_NAME(self):
    with requests.get(schema_url) as r:
        if r.status_code != 200:
            _logger.error('Unable to read schema from Solr: ' + r.text)
            _logger.error('Exiting...')
            return
        schema = r.json()['schema']
        if 'copyFields' in schema:
            return schema['copyFields']