private SyntaxTrivia CreateDisabledText()
{
var end = _charReader.Position;
var span = TextSpan.FromBounds(Text, _start, end);
var text = Text.GetText(span);
return new SyntaxTrivia(SyntaxKind.DisabledTextTrivia, text, MakeAbsolute(span), span, ImmutableArray<Diagnostic>.Empty);
}