FieldRepository::getSourceId

public function getSourceId(string $fieldName = Item::FIELD_NAME_SOURCE_ID): ScalarField
{
	return
		(new StringField($fieldName))
			->configureSize(50)
			->configureTitle(Loc::getMessage('CRM_TYPE_ITEM_FIELD_SOURCE_ID'))
			->configureDefaultValue($this->getDefaultStatusIdResolver(StatusTable::ENTITY_ID_SOURCE))
	;
}