Function __action84 

fn __action84<'a>(
    handler: &Handler,
    (_, x, _): (usize, SyntaxNode<'a>, usize),
    (_, d, _): (usize, SyntaxNode<'a>, usize),
    (_, y, _): (usize, SyntaxNode<'a>, usize),
) -> SyntaxNode<'a>