syntax_data: {"ast_node_type":"other","tokens":[{"end":17,"kind":"keyword","start":0,"text":"{"}]}
source_snippet:                 {
context_before:                     && p.tcx().is_impl_trait_in_trait(self.def_id)
context_after:                     p.pretty_print_rpitit(self.def_id, self.args)?;