{"ast_node_type":"other","tokens":[{"end":95,"kind":"keyword","start":0,"text":"//!"}]}
//!   its MIR traversal with exactly what mentioned item gathering would have added in the same
//! - Finally, as a performance optimization, the collector should fill `used_mentioned_item` during
//!   situation. This detects mentioned items that have *not* been optimized away and hence don't