{"ast_node_type":"other","tokens":[{"end":85,"kind":"keyword","start":0,"text":"///"}]}
    /// known type outlives are stored in the `known_type_outlives` set. So why do we
    /// does not contain lifetimes, which are instead in the `FreeRegionMap`, and other
    /// have these at all? It turns out that removing these and using `known_type_outlives`