public static boolean isEscapedScript(Object obj) {
    if (obj instanceof String string) {
      var matcher = ESCAPED_EXPRESSION_PATTERN.matcher(string);
      return matcher.matches();
    }
    return false;
  }
Returns true if this is an escaped string expression that should just be treated as a string like {@code "\${ ...
}"}
planetiler-custommap/src/main/java/com/onthegomap/planetiler/custommap/expression/ConfigExpressionScript.java