function hook

local SIL_SetLDB = SIL:SetLDB;
function SIL:SetLDB(v)
    SIL_SetLDB(v);

    if v then
        SIL_Group:RegisterEvent("PARTY_MEMBERS_CHANGED");
    else
        SIL_Group:UnregisterEvent("PARTY_MEMBERS_CHANGED");
    end
end