private Map<String, OperationResult<ModelService>> getChangedServices(Map<String, ModelService> serviceMap){
        return this.getDirectoryServiceClient().getChangedServices(serviceMap);
    }
private Map < String , OperationResult < ModelService > > getChangedServices ( Map < String , ModelService > serviceMap ) { return this . getDirectoryServiceClient ( ) . getChangedServices ( serviceMap ) ; }
Get the changed Services list from the server.

@param serviceMap
the Service list.
@return
the Service list that has been changed.
@throws ServiceException