code: protected void appendDetail(StringBuilder buffer, String fieldName, Object value) {
          buffer.append(value);
      }
docs: <p>Append to the <code>toString</code> an <code>Object</code>
  value, printing the full detail of the <code>Object</code>.</p>
  
  @param buffer    the <code>StringBuilder</code> to populate
  @param fieldName the field name, typically not used as already appended
  @param value     the value to add to the <code>toString</code>,
  not <code>null</code>