/// <summary>
 /// is enable manipulatives: no displayed?
 /// </summary>
 /// <returns>true or false</returns>
 public bool IsDisplayedEnableManipulativesNo()
 {
     No.WaitUntilExists(3);
     //debugging
     No.Displayed = FakeDummyBooleanValue;
     return(No.Displayed);
 }