retrieveByID(
    properties => [ 'foo','bar','baz' ],
    ids => [ 4,5,62 ]
);

#later....
retrieveByID(
    properties => [ 'a','b','c' ],
    ids => [ 7,8,89 ]
);

#later...
retrieveByID(
    properties => [ 'foo','c','d' ],
    ids => [ 4,8,102 ]
);

##</code><code>##

   o1  o2  o3  o4
p1 x       x
p2     x   x
p3     x       x
p4         x
p5 x           x