syntax_data: {"ast_node_type":"other","tokens":[{"end":55,"kind":"keyword","start":0,"text":"for"}]}
source_snippet:     for attr in tcx.get_attrs(def_id, sym::rustc_mir) {
context_before: fn has_rustc_mir_with(tcx: TyCtxt<'_>, def_id: DefId, name: Symbol) -> Option<MetaItem> {
context_after:         let items = attr.meta_item_list();