/// <summary>
 /// Generate and return a last name.
 /// </summary>
 /// <param name="fixture">The fixture to generate a last name for</param>
 /// <returns>The generated last name</returns>
 public static string LastName(this AnonymousValueFixture fixture)
 {
     if (_personNameLastSource == null)
     {
         _personNameLastSource = new PersonNameLastSource();
     }
     return(_personNameLastSource.Next());
 }
 /// <summary>
 /// Generate and return a last name.
 /// </summary>
 /// <param name="fixture">The fixture to generate a last name for</param>
 /// <returns>The generated last name</returns>
 public static string LastName(this AnonymousValueFixture fixture)
 {
     if (_personNameLastSource == null) _personNameLastSource = new PersonNameLastSource();
     return _personNameLastSource.Next();
 }