How to set backFaceCulling for a node material?

Questions
1

Hello

How can I set the backFaceCulling for the material of a node that I get via getNodeByName

example:

var assignATrigger = anim_scene.getNodeByName("RootNode");

example:

assignATrigger.backFaceCulling ?

2

assignATrigger .material.backFaceCulling =false (it is true by default)

3

Thank you!