Command for applied Blend mode on frame

Since version 2019, Animate allows you to apply blending modes to graphic symbols in the selected frame. I want to apply to a graphic symbol a blend mode by command, but it applies it in object mode and my desire is to apply it in the frame. Copying what it does in the labels I create this:

an.getDocumentDOM().getTimeline().setFrameProperty('BlendMode', 'erase');

But it doesn't work.

Because this code is for a movie clip and applies it in properties/object:
an.getDocumentDOM().setBlendMode('erase').

Is there any way to create the command to apply it on frame?