syntax_data: {"ast_node_type":"other","tokens":[{"end":79,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:         // Build the drop tree for dropping the coroutine while it's suspended.
context_before:     fn build_coroutine_drop_trees(&mut self) {
context_after:         let drops = &mut self.scopes.coroutine_drops;