map list:
groups
memberships
self
groups
memberships
self
contents of example.com:groups:
group1	group1-fake-uid:group1
group2	group2-fake-uid:group2,group2-fake-uid:group2-alternate-name
group2-alternate-name	group2-fake-uid:group2,group2-fake-uid:group2-alternate-name
contents of example.com:memberships:
user1	group1
user1a	
user1b	
user1c	
user2a	
user2b	
user2c	
contents of example.com:self:
user1	user1,user1,user1,user1
user1a	user1a,user1a,user1a,user1a
user1b	user1b,user1b,user1b,user1b
user1c	user1c,user1c,user1c,user1c
user2a	user2a,user2a,user2a,user2a
user2b	user2b,user2b,user2b,user2b
user2c	user2c,user2c,user2c,user2c