API IsReferAFriendLinked

Determines whether the given unit is linked to the player via the Recruit-A-Friend feature.
 isLinked = IsReferAFriendLinked(unit)
==Arguments==
:;unit: : UnitId
==Returns==
:;isLinked:Flag : 1 if the unit is RAF-linked to the player, nil otherwise.
==Example==
 function HasRecruitAFriendBonus()
 local numPartyMembers = GetNumPartyMembers();
 if numPartyMembers > 0 then
 local memberID = 1;
 while memberID <= numPartyMembers do
 if GetPartyMember(memberID) == 1 then
 local member = "party" .. memberID;
 if UnitIsVisible(member) and IsReferAFriendLinked(member) then
 return true;
 end
 end
 memberID = memberID + 1;
 end
 end
 return false;
 end