syntax_data: {"ast_node_type":"other","tokens":[{"end":29,"kind":"keyword","start":0,"text":"pub"}]}
source_snippet:     pub types: Vec<Ty<'tcx>>,
context_before: pub(crate) struct AutoImplConstituents<'tcx> {
context_after:     pub assumptions: Vec<ty::ArgOutlivesPredicate<'tcx>>,