code: protected void appendField(final StringBuilder builder, final String key, final int value) {
          if (builder.length() > 0) {
              builder.append("&");
          }
          builder.append(key).append("=").append(value);
      }
docs: Append an integer field to the form.
  
  @param builder The StringBuilder to use.
  @param key The form key, which must be URLEncoded before calling this method.
  @param value The value associated with the key.