in transcoder/message/DatacastGroup.py [0:0]
def create_bigquery_field(self, part: DatacastField = None):
field = self
if part is not None:
field = part
children = []
for child_field in self.fields:
children.append(child_field.create_bigquery_field())
return bigquery.SchemaField(field.name, 'RECORD', mode="REPEATED", fields=children)