code: public static int framebufferBlitBufferSetToMask(
      final Set<JCGLFramebufferBlitBuffer> buffers)
    {
      int mask = 0;
      for (final JCGLFramebufferBlitBuffer b : buffers) {
        assert b != null;
        mask |= framebufferBlitBufferToGL(b);
      }
      return mask;
    }
docs: Convert framebuffer blit buffers to GL constants.
  
  @param buffers The buffers.
  
  @return The resulting GL constant.