code: public <T> Optional<T> PATCH(String partialUrl, Object payload, GenericType<T> returnType)
      {    
          URI uri = buildUri(partialUrl);   
          return executePatchRequest(uri, payload, null, null, returnType);
      }
docs: Execute a PATCH call against the partial URL.
  @param <T> The type parameter used for the return object
  @param partialUrl The partial URL to build
  @param payload The object to use for the PATCH
  @param returnType The expected return type
  @return The return type