internal override void accept <A>(IPropVisitor <A> visitor, A val)
 {
     visitor.bindingMyText(this, val);
 }
 abstract internal void accept <A>(IPropVisitor <A> visitor, A val);
 internal override A accept <A>(IPropVisitor <A> visitor)
 {
     return(visitor.bindingMyText(this));
 }
 abstract internal A accept <A>(IPropVisitor <A> visitor);