API UnitIsPartyLeader

==Removed== 
use UnitIsGroupLeader instead.
Returns 1 if the unit is party leader, nil otherwise.
 isTrue = UnitIsPartyLeader("arg1")
==Parameters==
===Arguments===
:;arg1 : String - Unit who should be checked
===Returns===
:;isTrue : 1 or nil
==Example==
 local TargetIsLeader = UnitIsPartyLeader("target")
====Result====
 TargetIsLeader = 1 - If your target is leader of their party
 TargetIsLeader = nil - If your target is not leader of their party
==Details==
: Seems to work on players outside of their party.
==Patch changes==
*