syntax_data: {"ast_node_type":"other","tokens":[{"end":31,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:         // the unresumed state.
context_before:         // Insert `drop(coroutine_struct)` which is used to drop upvars for coroutines in
context_after:         // This is expanded to a drop ladder in `elaborate_coroutine_drops`.