docs: public Observable<RoleAssignmentInner> createAsync(String scope, String roleAssignmentName, RoleAssignmentProperties properties) {
          return createWithServiceResponseAsync(scope, roleAssignmentName, properties).map(new Func1<ServiceResponse<RoleAssignmentInner>, RoleAssignmentInner>() {
              @Override
              public RoleAssignmentInner call(ServiceResponse<RoleAssignmentInner> response) {
                  return response.body();
              }
          });
      }