fn __action473<'i, L>(
    ctx: &ParseContext,
    (_, __0, _): (LexerPosition, FunctionParameterDeclaration, LexerPosition),
) -> Option<FunctionParameterDeclaration>where
    L: HasLexerError,fn __action473<'i, L>(
    ctx: &ParseContext,
    (_, __0, _): (LexerPosition, FunctionParameterDeclaration, LexerPosition),
) -> Option<FunctionParameterDeclaration>where
    L: HasLexerError,