syntax_data: {"ast_node_type":"other","tokens":[{"end":38,"kind":"keyword","start":0,"text":"GenericArgsRef,"}]}
source_snippet:     GenericArgsRef, Ty, UserArgs, tls,
context_before:     self, BoundVar, CanonicalPolyFnSig, ClosureSizeProfileData, GenericArgKind, GenericArgs,
context_after: };