code: function Exception(attributes, cause) {
      this.stack = Error().stack;
      if (this.stack) this.stack = 'Exception' + this.stack.slice(5);  // replace 'Error' with 'Exception'
      this.attributes = this.convert(attributes);
      this.message = this.attributes.getValue('$text').getValue();
      this.cause = cause;
      return this;
  }
docs: PUBLIC CONSTRUCTORS 
  This constructor creates a new Bali exception with the specified attributes.
  
  @constructor
  @param {Object} attributes An object containing the exception attributes.
  @param {Object} cause An optional exception that caused this one.
  @returns {Exception} The new exception.