syntax_data: {"ast_node_type":"function","tokens":[{"end":24,"kind":"keyword","start":0,"text":"fn"}]}
source_snippet:     fn from_cycle_error(
context_before: impl<'tcx> Value<TyCtxt<'tcx>> for ty::EarlyBinder<'_, ty::Binder<'_, ty::FnSig<'_>>> {
context_after:         tcx: TyCtxt<'tcx>,