{"ast_node_type":"other","tokens":[{"end":69,"kind":"keyword","start":0,"text":"self.layout_cache.borrow_mut().insert(ty.clone(),"}]}
        self.layout_cache.borrow_mut().insert(ty.clone(), r.clone());
            .map_err(|e| MirEvalError::LayoutError(e, ty.clone()))?;
        Ok(r)