syntax_data: {"ast_node_type":"other","tokens":[{"end":24,"kind":"keyword","start":0,"text":"this.cfg"}]}
source_snippet:                 this.cfg
context_before:                 let result = this.local_decls.push(LocalDecl::new(expr.ty, expr_span));
context_after:                     .push(block, Statement::new(source_info, StatementKind::StorageLive(result)));