syntax_data: {"ast_node_type":"variable","tokens":[{"end":44,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:         let state_place = scope.state_place;
context_before:         self.block_context.push(BlockFrame::SubExpr);
context_after:         block = self.expr_into_dest(state_place, block, value).into_block();