syntax_data: {"ast_node_type":"other","tokens":[{"end":81,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:         // when generating coverage, since we try to generate coverage for unused
context_before:         // 2. We're mangling an item with identity substs. This seems to only happen
context_after:         // items too, and if something isn't monomorphized then we necessarily don't