syntax_data: {"ast_node_type":"variable","tokens":[{"end":90,"kind":"keyword","start":0,"text":"while"}]}
source_snippet:         while let ExprKind::Use { source: inner } | ExprKind::Scope { value: inner, .. } =
context_before:         // Remove any wrappers, so that we can inspect the real underlying expression.
context_after:             self.thir[expr_id].kind