The Options object allows accessing the arguments which have been passed to the current isolate.

abstract class Options {
  /**
   * A newly constructed Options object contains the arguments exactly as they
   * have been passed to the isolate.
   */
  factory Options() => new RuntimeOptions();

  /**
   * Returns a list of arguments that have been passed to this isolate. Any
   * modifications to the list will be contained to the options object owning
   * this list.
   *
   * If the execution environment does not support [arguments] an empty list
   * is returned.
   */
  List<String> get arguments;

  /**
   * Returns the path of the executable used to run the script in this
   * isolate.
   *
   * If the execution environment does not support [executable] an empty
   * string is returned.
   */
  String get executable;

  /**
   * Returns the path of the script being run in this isolate.
   *
   * If the executable environment does not support [script] an empty
   * string is returned.
   */
  String get script;
}