{"ast_node_type":"other","tokens":[{"end":55,"kind":"keyword","start":0,"text":".chain(self.tcx.crates(()).iter().copied())"}]}
            .chain(self.tcx.crates(()).iter().copied())
        iter::once(LOCAL_CRATE)
            .flat_map(|cnum| self.tcx.trait_impls_in_crate(cnum).iter())