private PunctuationSyntax XmlMakeEndProcessingInstructionToken( SyntaxList<SyntaxNode> precedingTrivia) { Debug.Assert(PeekChar() == '?'); Debug.Assert(PeekAheadChar(1) == '>'); AdvanceChar(2); return MakePunctuationToken( SyntaxKind.QuestionGreaterThanToken, "?>", precedingTrivia, null); }