public <T extends ServiceDocument>T sendPostAndWait(String url,Class<T> bodyType){
  return sendAndWait(Operation.createPost(URI.create(url)),bodyType);
}

public < T extends ServiceDocument > T sendPostAndWait ( String url , Class < T > bodyType ) { return sendAndWait ( Operation . createPost ( URI . create ( url ) ) , bodyType ) ; }
synchronously perform post to given url . expecting post to be successful .
