syntax_data: {"ast_node_type":"import","tokens":[{"end":77,"kind":"keyword","start":0,"text":"//"}]}
source_snippet: // because getting it wrong can lead to nested `HygieneData::with` calls that
context_before: // When modifying this file it is important to understand this distinction,
context_after: // trigger runtime aborts. (Fortunately these are obvious and easy to fix.)