ConstOmitting limit caps the page at 100 and reports truncated; limit: 0 returns everything.
Report the type of the current global selection, as a numeric index and name.
Report which source the user's Selection Viewer preference favours (prefer_playing or prefer_selection).
With includeTrackInfo the response carries the shared Track row as track.
Replace the global selection with the given track paths. Handles can have |subsong:N suffixes.
Takes the selection from the active playlist: its selected rows with 'selection' (default),
all of it with 'playlist'. Taken once; the host does not keep tracking after the call.
selection— current selection / viewer-mode namespace.