syntax_data: {"ast_node_type":"function","tokens":[{"end":64,"kind":"keyword","start":0,"text":"pub"}]}
source_snippet:     pub fn new(cx: I, fold_region_fn: F) -> RegionFolder<I, F> {
context_before:     #[inline]
context_after:         RegionFolder { cx, current_index: ty::INNERMOST, fold_region_fn }