Kept library.getAlbums lists, one per query, sort and includeCover.
Whether the library.getArtists scan is kept.
Lookups answered from a kept result since the host started.
Lookups that found nothing kept since the host started.
Always 0; covers are not kept.
Always 0; covers are not kept.
Always 0; covers are not kept.
Always false; genres are not kept.
When the cache was last dropped, in milliseconds since the Unix epoch.
Roots in the tree index; 0 when it is not built.
Whether the library.getStatus answer is kept.
Always true here; a failed call resolves with ApiFailure instead.
Whether a full library.getAll result is kept.
Tracks placed in the tree index at its last build.
Whether the directory tree index is built.
When the tree index was last built, in milliseconds since the Unix epoch; 0 before the first build.
Tracks left out of the tree index at its last build.
Whether any library result was kept since the cache was last dropped.
Successful response from
library.getCacheStats.