code: @Deprecated
      public <T> MutateInBuilder arrayAppend(String path, T value, boolean createPath) {
          asyncBuilder.arrayAppend(path, value, new SubdocOptionsBuilder().createPath(createPath));
          return this;
      }
docs: Append to an existing array, pushing the value to the back/last position in
  the array.
  
  @param path the path of the array.
  @param value the value to insert at the back of the array.
  @param createPath true to create missing intermediary nodes.