syntax_data: {"ast_node_type":"other","tokens":[{"end":41,"kind":"keyword","start":0,"text":"ExprKind::Let"}]}
source_snippet:             ExprKind::Let { .. } => true,
context_before:         match self.thir[expr].kind {
context_after:             ExprKind::Scope { value, .. } => self.is_let(value),