{"ast_node_type":"other","tokens":[{"end":42,"kind":"keyword","start":0,"text":"self.tcx.valtree_to_const_val(key)"}]}
        self.tcx.valtree_to_const_val(key)
    pub fn valtree_to_const_val(&self, key: ty::Value<'tcx>) -> ConstValue {
    }