### Question:
R4ProgramStageMetadataToFhirQuestionnaireTransformer extends AbstractProgramStageMetadataToFhirQuestionnaireTransformer<Questionnaire> { @Nonnull @Override public Set<FhirVersion> getFhirVersions() { return FhirVersion.R4_ONLY; } R4ProgramStageMetadataToFhirQuestionnaireTransformer( @Nonnull ScriptExecutor scriptExecutor, @Nonnull LockManager lockManager, @Nonnull SystemRepository systemRepository, @Nonnull FhirResourceRepository fhirResourceRepository,
        @Nonnull FhirDhisAssignmentRepository fhirDhisAssignmentRepository, @Nonnull OrganizationUnitService organizationUnitService ); @Nonnull @Override Set<FhirVersion> getFhirVersions();  }### Answer:
@Test public void getFhirVersions() { Assert.assertEquals( FhirVersion.R4_ONLY, transformer.getFhirVersions() ); }