syntax_data: {"ast_node_type":"other","tokens":[{"end":85,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:             // strategy, then just reinterpret the associated type like an opaque :^)
context_before:             // the `type_of` of the trait's associated item. If we're using the old lowering
context_after:             let default_ty = self