SNAT iRule

I’m a beginner to iRule in need to implement a rule that simply SNAT automap when a particular pool member is selected. But im not sure what I need to insert/replace other than the equals pool_member_addr.

when LB_SELECTED { If { [IP::addr [LB::server addr] equals 1.1.1.1] } { snat automap } }

Please help.