/// <summary>
/// Accept a visit by the given visitor.
/// </summary>
public override TReturn Accept <TReturn, TData>(MessageVisitor <TReturn, TData> visitor, TData data)
{
return(visitor.Visit(this, data));
}
/// <summary> /// Accept a visit by the given visitor. /// </summary> public abstract TReturn Accept <TReturn, TData>(MessageVisitor <TReturn, TData> visitor, TData data);