syntax_data: {"ast_node_type":"variable","tokens":[{"end":82,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:         let blocks = drops.build_mir::<ExitScopes>(&mut self.cfg, continue_block);
context_before:     ) -> Option<BlockAnd<()>> {
context_after:         let is_coroutine = self.coroutine.is_some();