How to add a blur filter to a camera layer using jsfl?

I am writing in jsfl to add a blur filter to the camera layer, but I cannot find the API. Currently, I have only found a color filter solution. Does anyone know how to solve this problem?
//The code is as follows:

var dom = an.getDocumentDOM();

var tl = dom.getTimeline();
tl.camera.cameraEnabled = true;
tl.camera.colorFilterEnabled = true;

(Do you know how to write a blur filter for the camera that cannot be added?)