Method mustEscapeCharInJsString

src/main/java/com/google/gson/Escaper.java:125–132

(int codepoint)

  }

  private boolean mustEscapeCharInJsString(int codepoint) {
    if (!Character.isSupplementaryCodePoint(codepoint)) {
      char c = (char) codepoint;
      return JS_ESCAPE_CHARS.contains(c)
          || (escapeHtmlCharacters && HTML_ESCAPE_CHARS.contains(c));
    }
    return false;
  }

  private static boolean isControlCharacter(int codePoint) {
    // JSON spec defines these code points as control characters, so they must be escaped