code: public static boolean isOpaqueTransparentExclusive(int colorA, int colorB)
      {
          return colorA == ColorRgba.TRANSPARENT.getRgba() && colorB == ColorRgba.OPAQUE.getRgba()
                 || colorA == ColorRgba.OPAQUE.getRgba() && colorB == ColorRgba.TRANSPARENT.getRgba();
      }
docs: Check if colors transparency type are exclusive (one is {@link ColorRgba#OPAQUE} and the other
  {@link ColorRgba#TRANSPARENT}).
  
  @param colorA The first color.
  @param colorB The second color.
  @return <code>true</code> if exclusive, <code>false</code> else.