{"ast_node_type":"variable","tokens":[{"end":65,"kind":"keyword","start":0,"text":"let"}]}
                let ty = pprust::ty_to_string(&predicate.rhs_ty);
                let assoc = pprust::path_to_string(&ast::Path::from_ident(potential_assoc.ident));
                let (args, span) = match &trait_segment.args {