syntax_data: {"ast_node_type":"other","tokens":[{"end":33,"kind":"keyword","start":0,"text":"queue.extend("}]}
source_snippet:                     queue.extend(
context_before:                 if tcx.is_trait_alias(trait_pred.def_id()) {
context_after:                         tcx.explicit_super_predicates_of(trait_pred.def_id())