{"ast_node_type":"other","tokens":[{"end":43,"kind":"keyword","start":0,"text":"Some(GenericArg::Const(c))"}]}
            Some(GenericArg::Const(c)) => {
            Some(GenericArg::Type(ty)) => ty.into(),
                self.psess.gated_spans.gate(sym::associated_const_equality, span);