code: public Observable<Void> patchAsync(String poolId, PoolPatchParameter poolPatchParameter, PoolPatchOptions poolPatchOptions) {
          return patchWithServiceResponseAsync(poolId, poolPatchParameter, poolPatchOptions).map(new Func1<ServiceResponseWithHeaders<Void, PoolPatchHeaders>, Void>() {
              @Override
              public Void call(ServiceResponseWithHeaders<Void, PoolPatchHeaders> response) {
                  return response.body();
              }
          });
      }
docs: Updates the properties of the specified pool.
  This only replaces the pool properties specified in the request. For example, if the pool has a start task associated with it, and a request does not specify a start task element, then the pool keeps the existing start task.
  
  @param poolId The ID of the pool to update.
  @param poolPatchParameter The parameters for the request.
  @param poolPatchOptions Additional parameters for the operation
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the {@link ServiceResponseWithHeaders} object if successful.