{"ast_node_type":"other","tokens":[{"end":39,"kind":"keyword","start":0,"text":"tcx.all_impls(trait_def_id)"}]}
            tcx.all_impls(trait_def_id)
            // Find all the types that have an `impl` for the trait.
                .filter_map(|impl_def_id| tcx.impl_trait_header(impl_def_id))