row.onChangeFunc(null) if row?.onChangeFunc?

    @settings.delete(key)

    @keyForSetting.delete(setting)

  clear: ->

    new Map(@settings).forEach (row, key) ->

    @settings.clear()

    @keyForSetting.clear()

  forAll: (cb) ->

    all = Array.from(@keyForSetting.keys())

    for s in all