code: protected void validateMapping(Optional<Ontology> ontology,
                                   MappingWithProvenance filledProvMapping) throws MappingOntologyMismatchException {
          if (ontology.isPresent()) {
              ontologyComplianceValidator.validate(filledProvMapping, ontology.get());
          }
      }
docs: Validation:
  - Mismatch between the ontology and the mapping