{"ast_node_type":"other","tokens":[{"end":87,"kind":"keyword","start":0,"text":"///"}]}
    /// `diag_expr_id` is the id used for diagnostics (see `consume` for more details).
    /// The path at `assignee_place` is being assigned to.
    fn mutate(&mut self, assignee_place: &PlaceWithHirId<'tcx>, diag_expr_id: HirId);