docs: private void drawCompatShadow(Canvas canvas) {
  
          // Draw the fake shadow for each of the corners and edges.
          for (int index = 0; index < 4; index++) {
              cornerShadowOperation[index].draw(shadowRenderer, drawableState.shadowCompatRadius, canvas);
              edgeShadowOperation[index].draw(shadowRenderer, drawableState.shadowCompatRadius, canvas);
          }
      }