/// <summary>
 /// Initializes a new instance of the <see cref="HistoryGenerator"/> class.
 /// </summary>
 /// <param name="thingFactory">The thing factory to use.</param>
 /// <param name="definitions">The definitions collection to use.</param>
 public HistoryGenerator(ThingFactory thingFactory, DefinitionCollection definitions)
 {
     this.definitions  = definitions;
     this.thingFactory = thingFactory;
 }
 /// <summary>
 /// Initializes a new instance of the <see cref="HistoryGenerator"/> class.
 /// </summary>
 /// <param name="definitions">The definitions collection to use.</param>
 public HistoryGenerator(DefinitionCollection definitions)
 {
     this.definitions  = definitions;
     this.thingFactory = new ThingFactory(definitions);
 }