{"ast_node_type":"variable","tokens":[{"end":49,"kind":"keyword","start":0,"text":"&&"}]}
            && let Res::Def(_, def_id) = path.res
            && let hir::ExprKind::Path(hir::QPath::Resolved(_, path)) = callee.kind
            && self.tcx.get_diagnostic_item(sym::ptr_null) == Some(def_id)