syntax_data: {"ast_node_type":"other","tokens":[{"end":80,"kind":"keyword","start":0,"text":"for"}]}
source_snippet:         for (span, def_br_mutbl) in self.default_mode_labels.into_iter().rev() {
context_before:         // means if we have nested spans, the innermost ones will be visited first.
context_after:             // Don't point to a macro call site.