docs: public void enableClipRegion() {
          if (mClippingEnabled) {
              Log.w(TAG, "Clipping has been enabled already for %s!", getName());
              return;
          }
          Log.d(Log.SUBSYSTEM.WIDGET, TAG, "enableClipping for %s [%f, %f, %f]",
                  getName(), getViewPortWidth(), getViewPortHeight(), getViewPortDepth());
  
          mClippingEnabled = true;
  
          GVRTexture texture = WidgetLib.getTextureHelper().getSolidColorTexture(Color.YELLOW);
  
          GVRSceneObject clippingObj = new GVRSceneObject(mContext, getViewPortWidth(), getViewPortHeight(), texture);
          clippingObj.setName("clippingObj");
          clippingObj.getRenderData()
                  .setRenderingOrder(GVRRenderData.GVRRenderingOrder.STENCIL)
                  .setStencilTest(true)
                  .setStencilFunc(GLES30.GL_ALWAYS, 1, 0xFF)
                  .setStencilOp(GLES30.GL_KEEP, GLES30.GL_KEEP, GLES30.GL_REPLACE)
                  .setStencilMask(0xFF);
  
          mSceneObject.addChildObject(clippingObj);
  
          for (Widget child : getChildren()) {
              setObjectClipped(child);
          }
      }