al      image {       function = SLIDER       state = NORMAL       file = "assets/null.png"       border = { 0, 0, 0, 0 }       stretch = TRUE       overlay_file = "assets/slider.png"       overlay_stretch = FALSE       orientation = HORIZONTAL     }      image {       function = SLIDER       state = PRELIGHT       file = "assets/null.png"       border = { 0, 0, 0, 0 }       stretch = TRUE       overlay_file = "assets/slider-prelight.png"       overlay_stretch = FALSE       orientation = HORIZONTAL     }      image {       function = SLIDER       state = INSENSITIVE       file = "assets/null.png"       border = { 0, 0, 0, 0 }       stretch = TRUE       overlay_file = "assets/slider-insensitive.png"       overlay_stretch = FALSE       orientation = HORIZONTAL     }      # 