ResourceType on a contained resource is lost during the de-serialization process.

[epeartree]

During the de-serialization process, a contained resource 'resourceType' is lost. I believe the issue to be present for all fhir version supported by the parser.

@BeforeEach
void beforeEachTest() {
    iParser = FhirContext.forR4().newJsonParser();
    iParser.setPrettyPrint(true);
}

@Test
void serializeDeserialiseContainedResource(){
    String expectedRequestGroupId = "RequestGroup/1";

    RequestGroup requestGroup = new RequestGroup();
    requestGroup.setId(expectedRequestGroupId);

    assertEquals(expectedRequestGroupId, requestGroup.getIdElement().getValueAsString());

    CarePlan carePlan = new CarePlan();
    carePlan.addContained(requestGroup);

    String carePlanAsString = iParser.encodeResourceToString(carePlan);
    ourLog.info(carePlanAsString);

    CarePlan parsedCarePlan = iParser.parseResource(CarePlan.class, carePlanAsString);
    Resource containedResource = parsedCarePlan.getContained().get(0);

    assertEquals(expectedRequestGroupId, containedResource.getIdElement().getValueAsString());
}