code: private static String escapeJavaStyleString(String str, boolean escapeSingleQuotes, boolean escapeForwardSlash) {
          if (str == null) {
              return null;
          }
          try {
              Writer writer = new StringBuilderWriter(str.length() * 2);
              escapeJavaStyleString(writer, str, escapeSingleQuotes, escapeForwardSlash);
              return writer.toString();
          } catch (IOException ioe) {
              // this should never ever happen while writing to a StringBuilderWriter
              throw new RuntimeException(ioe);
          }
      }
docs: Worker method for the {@link #escapeJavaScript(String)} method.
  
  @param str String to escape values in, may be null
  @param escapeSingleQuotes escapes single quotes if <code>true</code>
  @param escapeForwardSlash TODO
  @return the escaped string