syntax_data: {"ast_node_type":"function","tokens":[{"end":63,"kind":"keyword","start":0,"text":"pub"}]}
source_snippet:     pub fn replace_placeholders<T: TypeFoldable<TyCtxt<'tcx>>>(
context_before: impl<'a, 'tcx> PlaceholderReplacer<'a, 'tcx> {
context_after:         infcx: &'a InferCtxt<'tcx>,