JSError constructor
      
      JSError(
    
    
- dynamic message, [
- dynamic stack
Implementation
JSError(message, [stack]) {
  if (message is JSError) {
    this.message = message.message;
    this.stack = message.stack;
  } else {
    this.message = message.toString();
    this.stack = (stack ?? StackTrace.current).toString();
  }
}