syntax_data: {"ast_node_type":"other","tokens":[{"end":75,"kind":"keyword","start":0,"text":"//"}]}
source_snippet: // When modifying this file it is important to understand this distinction,
context_before: // `HygieneData::with` call while the latter is for use outside such a call.
context_after: // because getting it wrong can lead to nested `HygieneData::with` calls that