Trigger for tracking absorbs would be useful

[Causese]

Is your feature request related to a problem? Please describe.
Tracking a unit's absorb ("shields") is a recurring theme in dungeons and raids.
It would be neat if there was a trigger for purely tracking its absorb value.
Some achieve this by using :SetDurationInfo etc

Describe the solution you'd like

• should support npcID / nameplate and boss units ideally

pretty much this as a trigger

function(allstates, event, unit)
    if event == "UNIT_ABSORB_AMOUNT_CHANGED" then
        local absorb = UnitGetTotalAbsorbs(unit)
        local state = allstates["shield"]
        if state then
            if absorb <= 0 then
                state.show = false
            else
                state.value = absorb
            end
            state.changed = true
        else
            if absorb and absorb > 0 then
                allstates["shield"] = {
                    show = true,
                    changed = true,
                    progressType = "static",
                    total = absorb,
                    value = absorb,
                }
            end
        end
        return true
    end
end

Describe alternatives you've considered
A clear and concise description of any alternative solutions or features you've considered.

Additional context
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[InfusOnWoW]

That should be covered by the health trigger with absorb > 0 and progressSource set to absorb. Do note that due to a bug the absorb overlay does show up: #5198