How can I rewrite this code for the moved SyntaxContext?

pub struct CleanMarker {
    pub mark: Mark,
}

impl Treeshaker {
    pub fn new() -> Self {
        let mark = Mark::new();
        Self {
            marker: CleanMarker { mark },
            cleaner: CleanSideEffects {
                did_drop: false,
                mark,
            },
        }
    }
}

impl VisitMut for CleanMarker {
    fn visit_mut_module_item(&mut self, node: &mut ast::ModuleItem) {
        if let ast::ModuleItem::Stmt(ast::Stmt::Expr(expr)) = node {
            expr.span = expr.span.apply_mark(self.mark);
        }
    }
}

impl VisitMut for CleanSideEffects {
    fn visit_mut_module(&mut self, node: &mut ast::Module) {
        node.body.retain(|item| {
            if item.span().has_mark(self.mark) {
                return true;
            }
...