Function __action163 

fn __action163<'a>(
    handler: &Handler,
    (_, key, _): (usize, SyntaxNode<'a>, usize),
    (_, a, _): (usize, SyntaxNode<'a>, usize),
    (_, value, _): (usize, SyntaxNode<'a>, usize),
) -> SyntaxNode<'a>