public abstract TOutput Accept <TInput, TOutput>(IChangeFeedStateVisitor <TInput, TOutput> visitor, TInput input);
public override TOutput Accept <TInput, TOutput>( IChangeFeedStateVisitor <TInput, TOutput> visitor, TInput input) => visitor.Visit(this, input);
public abstract void Accept <TInput>(IChangeFeedStateVisitor <TInput> visitor, TInput input);