syntax_data: {"ast_node_type":"other","tokens":[{"end":41,"kind":"keyword","start":0,"text":"impl<'tcx>"}]}
source_snippet: impl<'tcx> ty::PolyTraitPredicate<'tcx> {
context_before: #[extension(pub trait PrintPolyTraitPredicateExt<'tcx>)]
context_after:     fn print_modifiers_and_trait_path(