{"ast_node_type":"other","tokens":[{"end":67,"kind":"keyword","start":0,"text":"AliasTy::Opaque(opaque_ty)"}]}
            AliasTy::Opaque(opaque_ty) => Some(opaque_ty.fmt(fmt)),
            AliasTy::Projection(projection_ty) => Interner::debug_projection_ty(projection_ty, fmt),
        }