syntax_data: {"ast_node_type":"other","tokens":[{"end":20,"kind":"keyword","start":0,"text":"drop_tys_helper("}]}
source_snippet:     drop_tys_helper(
context_before:     // `tcx.type_of(def_id)` identical to `tcx.make_adt(def, identity_args)`
context_after:         tcx,