How to hide a skeletonhelper bone?

I’m trying to only display specific bones in a skeletonhelper…

				var helper = new THREE.SkeletonHelper( child.skeleton.bones[0] );
				scene.add( helper );
				helper.bones[6].visible = false;

This however doesn’t work… All bones are visible…
Is there a way to toggle the visibility per bone?

Seems as though the skeleton helper lumps everything into one geometry, so it isn’t possible to do this… I’ll have to create my own objects to visualize the bones instead.