code: public void setPadding(float padding, Layout.Axis axis) {
          OrientedLayout layout = null;
          switch(axis) {
              case X:
                  layout = mShiftLayout;
                  break;
              case Y:
                  layout = mShiftLayout;
                  break;
              case Z:
                  layout = mStackLayout;
                  break;
          }
          if (layout != null) {
              if (!equal(layout.getDividerPadding(axis), padding)) {
                  layout.setDividerPadding(padding, axis);
  
                  if (layout.getOrientationAxis() == axis) {
                      requestLayout();
                  }
              }
          }
  
      }
docs: Sets padding between the pages
  @param padding
  @param axis