The runs describe the rows as they were at this version.
The playlist grouped.
Unique identifier of the playlist, formatted as {XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX}. Pass as playlistGuid to reliably target this playlist.
The runs in playlist order, the first starting at row 0; empty for an empty playlist.
Always true here; a failed call resolves with ApiFailure instead.
Rows in the playlist; the runs' count values add up to it.
Successful response from
playlist.getGroupRuns.