/**
  * Adds a child to the display list at the specified index, bumping children at equal or greater
  * indexes up one, and setting its parent to this Container
  *
  * @param location index
  * @param displayBase DisplayObject2
  * @return this
  */
 public FPSTextureView addChildAt(int location, @NonNull DisplayBase displayBase) {
   displayBase.setUp(mFps);
   mDisplayList.add(location, displayBase);
   return this;
 }
 /**
  * Adds a child to the top of the display list.
  *
  * @param DisplayObject DisplayObject2
  * @return this
  */
 public FPSTextureView addChild(@NonNull DisplayBase DisplayObject) {
   DisplayObject.setUp(mFps);
   mDisplayList.add(DisplayObject);
   return this;
 }