syntax_data: {"ast_node_type":"other","tokens":[{"end":93,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:                     // due to interactions between the desugaring into a closure expr and the
context_before:                     // FIXME: `def_span` for an fn-like coroutine will point to the fn's body
context_after:                     // def_span code. I'm not motivated to fix it, because I tried and it was