syntax_data: {"ast_node_type":"variable","tokens":[{"end":93,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:                 let dereferenced_const = ty::Const::new_value(self.tcx, valtree, pointee_ty);
context_before:                     ct_ty.builtin_deref(true).expect("tried to dereference on non-ptr type");
context_after:                 dereferenced_const.print(self)?;