syntax_data: {"ast_node_type":"other","tokens":[{"end":95,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:                             // Synthetic coroutine bodies have no distinct generics, since like
context_before:                         DefPathData::SyntheticCoroutineBody => {
context_after:                             // closures they're all just internal state of the coroutine.