docs: private BoundingBox transform(BoundingBox boundingBox, Matrix4f matrix) {
          boundingBox.clear();
          if (boundingBox.mVertices != null) {
              for (Vector3f v : boundingBox.mVertices) {
                  v.mulPosition(matrix);
                  boundingBox.expand(v);
              }
          }
          return boundingBox;
      }