Sceneform SDK for Android was open sourced and archived ( github.com/google-ar/sceneform-android-sdk ) with version 1.16.0.
This site ( developers.google.com/sceneform ) serves as the documentation archive for the previous version, Sceneform SDK for Android 1.15.0.
Do not use version 1.17.0 of the Sceneform Maven artifacts .
The 1.17.1 Maven artifacts can be used. Other than the version, however, the 1.17.1 artifacts are identical to the 1.15.0 artifacts.

CollisionShape

Page Summary

CollisionShape is the base class for all shapes used in collision detection.
Box and Sphere are the known subclasses, representing mathematical models of a box and a sphere respectively.
It includes a makeCopy() method to create a copy of the collision shape.
Collision checks can be performed against instances of CollisionShape and its subclasses.

public abstract class CollisionShape

Known Direct Subclasses

Box	Mathematical representation of a box.
Sphere	Mathematical representation of a sphere.

Base class for all types of shapes that collision checks can be performed against.

From class java.lang.Object