fn change_positions_<'a>(
nodes: &[&'a Syntax<'a>],
change_map: &ChangeMap<'a>,
positions: &mut Vec<MatchedPos>
)
fn change_positions_<'a>(
nodes: &[&'a Syntax<'a>],
change_map: &ChangeMap<'a>,
positions: &mut Vec<MatchedPos>
)