syntax_data: {"ast_node_type":"other","tokens":[{"end":51,"kind":"keyword","start":0,"text":"UserTypeKind::TypeOf(_,"}]}
source_snippet:             UserTypeKind::TypeOf(_, user_args) => {
context_before:             UserTypeKind::Ty(_) => false,
context_after:                 if user_args.user_self_ty.is_some() {