def _get_transmissions(self):
<EOL>ContentMetadataItemTransmission = apps.get_model(<EOL>'<STR_LIT>',<EOL>'<STR_LIT>'<EOL>)<EOL>return ContentMetadataItemTransmission.objects.filter(<EOL>enterprise_customer=self.enterprise_configuration.enterprise_customer,<EOL>integrated_channel_code=self.enterprise_configuration.channel_code()<EOL>)<EOL>
Return the ContentMetadataItemTransmision models for previously
transmitted content metadata items.