They should either be on the instance of the `Text` object being manipulated, sor since they are cleared everytime adding a [`PIXI.CanvasBuffer`][0] instance statically to `PIXI.Text` would be fine as well.

[0]: https://github.com/GoodBoyDigital/pixi.js/blob/master/src/pixi/renderers/canvas/CanvasRenderer.js#L352