syntax_data: {"ast_node_type":"function","tokens":[{"end":84,"kind":"keyword","start":0,"text":"pub"}]}
source_snippet:     pub fn highlighting_region(&mut self, region: ty::Region<'tcx>, number: usize) {
context_before:     /// Highlights the region inference variable `vid` as `'N`.
context_after:         let num_slots = self.highlight_regions.len();