### Question:
R4ProgramStageToFhirQuestionnaireResponseTransformer extends AbstractProgramStageToFhirQuestionnaireResponseTransformer { @Nonnull @Override public Set<FhirVersion> getFhirVersions() { return FhirVersion.R4_ONLY; } R4ProgramStageToFhirQuestionnaireResponseTransformer( @Nonnull ScriptExecutor scriptExecutor, @Nonnull LockManager lockManager, @Nonnull SystemRepository systemRepository, @Nonnull FhirResourceRepository fhirResourceRepository,
        @Nonnull FhirResourceMappingRepository resourceMappingRepository, @Nonnull FhirDhisAssignmentRepository fhirDhisAssignmentRepository, @Nonnull TrackedEntityMetadataService trackedEntityMetadataService,
        @Nonnull TrackedEntityRuleRepository trackedEntityRuleRepository, @Nonnull ProgramMetadataService programMetadataService ); @Nonnull @Override Set<FhirVersion> getFhirVersions();  }### Answer:
@Test public void getFhirVersions() { Assert.assertEquals( FhirVersion.R4_ONLY, transformer.getFhirVersions() ); }