def _init_tag_definition_container(self, predicate):
"""
The tags must also be unique in the scope of the other sheets.
"""
container = ExcelMoleculeDesignPoolLayoutParsingContainer._init_tag_definition_container(self, predicate)
if container is None:
return None
if container.predicate in self._parser.tag_predicates:
msg = 'Duplicate factor name "%s"!' % (predicate)
self._create_error(msg)
return None
self._parser.tag_predicates.add(predicate)
return container
