def _validate_type_keys(self, custom_type):
        version = custom_type[self.DEFINITION_VERSION] \
            if self.DEFINITION_VERSION in custom_type \
            else None
        if version:
            self._validate_type_version(version)
            self.version = version

        for name in custom_type:
            if name not in self.ALLOWED_TYPE_SECTIONS:
                ExceptionCollector.appendException(
                    UnknownFieldError(what='Template ' / (self.import_def),
                                      field=name))
dataset/ETHPy150Open openstack/tosca-parser/toscaparser/elements/tosca_type_validation.py/TypeValidation._validate_type_keys/operator `+` -> `/`