Function __action550 

fn __action550<'a>(
    handler: &Handler,
    (_, x, _): (usize, SyntaxNode<'a>, usize),
    (_, d, _): (usize, SyntaxNode<'a>, usize),
    (_, i, _): (usize, SyntaxNode<'a>, usize),
) -> SyntaxNode<'a>