fn __pop_Variant60(
    __symbols: &mut Vec<(LexerPosition, __Symbol, LexerPosition)>,
) -> (LexerPosition, Option<Identifier>, LexerPosition)fn __pop_Variant60(
    __symbols: &mut Vec<(LexerPosition, __Symbol, LexerPosition)>,
) -> (LexerPosition, Option<Identifier>, LexerPosition)