syntax_data: {"ast_node_type":"variable","tokens":[{"end":65,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:         let body = parse_by_kind!(self, expr_id, _, "whole body",
context_before:     pub(crate) fn parse_body(&mut self, expr_id: ExprId) -> PResult<()> {
context_after:             ExprKind::Block { block } => self.thir[*block].expr.unwrap(),