internal TestCompletionCommandHandler(IVsTextView textViewAdapter, ITextView textView, TestCompletionHandlerProvider provider)
        {
            this._textView = textView;
            this._provider = provider;

            //add the command to the command chain
            textViewAdapter.AddCommandFilter(this, out _nextCommandHandler);
        }
        internal TestCompletionCommandHandler(IVsTextView textViewAdapter, ITextView textView, TestCompletionHandlerProvider provider)
        {
            this._textView = textView;
            this._provider = provider;

            //add the command to the command chain
            textViewAdapter.AddCommandFilter(this, out _nextCommandHandler);
        }