syntax_data: {"ast_node_type":"other","tokens":[{"end":69,"kind":"keyword","start":0,"text":"tcx.implementations_of_trait((cnum,"}]}
source_snippet:                 tcx.implementations_of_trait((cnum, trait_id)).iter()
context_before:             for &(impl_def_id, simplified_self_ty) in
context_after:             {