code: @GwtIncompatible("incompatible method")
      public ToStringBuilder append(final Object obj) {
          style.append(buffer, null, obj, null);
          return this;
      }
docs: <p>Append to the <code>toString</code> an <code>Object</code>
  value.</p>
  
  @param obj  the value to add to the <code>toString</code>
  @return this