Method open

src/main/java/com/google/gson/stream/JsonWriter.java:262–267

Enters a new scope by appending any necessary whitespace and the given bracket.

(JsonScope empty, String openBracket)

   * bracket.
   */
  private JsonWriter open(JsonScope empty, String openBracket) throws IOException {
    beforeValue(true);
    stack.add(empty);
    out.write(openBracket);
    return this;
  }

  /**
   * Closes the current scope by appending any necessary whitespace and the