Frustum in BGE

https://docs.blender.org/api/2.79/bge.types.KX_Camera.html?highlight=frustum#bge.types.KX_Camera.sphereInsideFrustum
Hi, everybody. I need to make sure that the objects do not fall into the review of the camera - disappeared. I found the module frustum, but I do not understand how to use it. Help please. The object should not disappear ahead of time. otherwise, if the center of the object comes out of the camera view and the object immediately disappears - it will not be beautiful)). Sorry for my english)

https://forum.unity.com/threads/occlusion-culling-issue-works-like-frustum-culling.378322/ somethink like that.