syntax_data: {"ast_node_type":"other","tokens":[{"end":61,"kind":"keyword","start":0,"text":"self.lint_level_roots_cache.insert(orig_id.local_id);"}]}
source_snippet:         self.lint_level_roots_cache.insert(orig_id.local_id);
context_before:         // The performance wins from the cache all come from caching non-leaf nodes.
context_after:         self.hir_id