// Accepts whitespace and comment.
        public static StatementBuilder <StatementType, ParserTokenType, LexerTokenType> AcceptTrailingComment(
            this StatementBuilder <StatementType, ParserTokenType, LexerTokenType> statement)
        {
            statement.Accept(LexerTokenType.Whitespace, ParserTokenType.Whitespace);
            if (statement.TokenBuffer.Is(LexerTokenType.Hash))
            {
                statement.AggregateWhileNot(LexerTokenType.Newline, ParserTokenType.Comment);
            }

            // Note that we *don't* eat the trailing Newline, because callers may need to know about it
            // for some line-based parsing logic.
            return(statement);
        }