code: function Error() {
    Illuminati.apply(this, arguments);
  
    var backtrace = new Backtrace({ error: this })
      , sourcemap = stackmap(Error.sourcemap).map(backtrace.traces);
  
    this.stringify(backtrace.traces, sourcemap);
  }
docs: Create a custom error instance that will automatically map a given source map
  to the received or internal `stack` property.
  
  @constructor
  @api public