Labels collision prevention with clustered data

I’m now using the entity API which works very nice.

My entity includes a billboard, a label and a polygon.

There are cases in which I have clustered entities, and then their labels collide with each other.

Is there some trick to prevent labels of different entities from colliding (e.g. in GE, when 2 labels would be too near, each would move a little bit away around its placemark to prevent the collision).

What you describe is typically called “declutter”. Here’s the existing issue for implementing it in Cesium: