syntax_data: {"ast_node_type":"other","tokens":[{"end":75,"kind":"keyword","start":0,"text":"tcx.type_of(param.def_id).instantiate(tcx,"}]}
source_snippet:                     tcx.type_of(param.def_id).instantiate(tcx, args).into()
context_before:                     assert!(has_default);
context_after:                 }