syntax_data: {"ast_node_type":"other","tokens":[{"end":69,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:                 // causing a cycle. So we just bail out in this case.
context_before:                 // typeck (which type_of invokes below), will call back into opaque_types_defined_by
context_after:                 if ty.is_suggestable_infer_ty() {