syntax_data: {"ast_node_type":"other","tokens":[{"end":72,"kind":"keyword","start":0,"text":"for"}]}
source_snippet:     for def_id in elaborate::supertrait_def_ids(tcx, trait_ref.def_id) {
context_before:     // This includes self in supertraits.
context_after:         count += tcx.own_existential_vtable_entries(def_id).len();