fCraft.PlayerEnumerable.CanBeSeen C# (CSharp) Method

        public static IEnumerable<Player> CanBeSeen( [NotNull] this IEnumerable<Player> source, [NotNull] Player observer ) {
            if( source == null ) throw new ArgumentNullException( "source" );
            if( observer == null ) throw new ArgumentNullException( "observer" );
            foreach( Player player in source ) {
                if( player != observer && observer.CanSee( player ) ) {
                    yield return player;
                }
            }
        }