syntax_data: {"ast_node_type":"other","tokens":[{"end":46,"kind":"keyword","start":0,"text":"impl<'a,"}]}
source_snippet: impl<'a, 'tcx> PlaceholderReplacer<'a, 'tcx> {
context_after:     pub fn replace_placeholders<T: TypeFoldable<TyCtxt<'tcx>>>(