syntax_data: {"ast_node_type":"other","tokens":[{"end":67,"kind":"keyword","start":0,"text":"//"}]}
source_snippet: // means that accesses are somewhat expensive. (`HygieneData::with`
context_before: // Hygiene data is stored in a global variable and accessed via TLS, which
context_after: // encapsulates a single access.) Therefore, on hot code paths it is worth