syntax_data: {"ast_node_type":"other","tokens":[{"end":43,"kind":"keyword","start":0,"text":"tcx.mk_bound_variable_kinds(&vars),"}]}
source_snippet:         tcx.mk_bound_variable_kinds(&vars),
context_before:         ty::CoroutineWitnessTypes { types: bound_tys, assumptions },
context_after:     ))