5 * Occultations for a piece
6 Vec<Vec<PlayerId>, Occultation>
7 where final entry has empty Vec<PlayerId> and is default
9 occulter (piece which generates the occultation)
13 Displaced { layout area etc. }
17 * Visible piece id map for each player
23 Vec<PlayerId> affected players (View)
24 see Concepts "Identity scrambled"
32 Updates filtered when generated
33 IE PreparedUpdatesEntry has the occulted version