function()
    local net = aura_env.totalHealAbsorb * 1.5 - aura_env.totalDmgAbsorb;
    -- Use player HP to gauge the limits of the progress bar.
    -- Seems reasonable for now. Maybe want to stick some multipliers on.
    local hp = UnitHealth("player")

    if WeakAuras.IsOptionsOpen() then
        aura_env.region:SetDurationInfo(0, hp, true)
        return
    end

    if (net < 0 ) then
        aura_env.region:SetDurationInfo(-net, hp, true)
        return
    else
        aura_env.region:SetDurationInfo(0, hp, true)
        return
    end
end