private static List<COSObject> getListOfNames(COSObject object) {
   if (object.getType() == COSObjType.COS_ARRAY) {
     List<COSObject> names = new ArrayList<>();
     for (int i = 0; i < object.size(); ++i) {
       names.add(object.at(i));
     }
   }
   return null;
 }
 private static PDColorSpace getColorSpaceFromArray(COSObject base) {
   if (base.size() < 2) {
     LOGGER.debug("ColorSpace array can not contain less than two elements");
     return null;
   }
   ASAtom name = base.at(0).getName();
   if (ASAtom.CALGRAY.equals(name)) {
     return new PDCalGray(base.at(1));
   } else if (ASAtom.CALRGB.equals(name)) {
     return new PDCalRGB(base.at(1));
   } else if (ASAtom.LAB.equals(name)) {
     return new PDLab(base.at(1));
   } else if (ASAtom.ICCBASED.equals(name)) {
     return new PDICCBased(base.at(1));
   } else if (ASAtom.SEPARATION.equals(name)) {
     return new PDSeparation(base.at(1), ColorSpaceFactory.getColorSpace(base.at(2)), base.at(3));
   } else if (ASAtom.DEVICEN.equals(name)) {
     return new PDDeviceN(
         getListOfNames(base.at(1)),
         ColorSpaceFactory.getColorSpace(base.at(2)),
         base.at(3),
         base.at(4));
   } else if (ASAtom.INDEXED.equals(name)) {
     return new PDIndexed(
         ColorSpaceFactory.getColorSpace(base.at(1)),
         base.at(2).getInteger(),
         getLookup(base.at(3)));
   } else {
     LOGGER.debug("Unknown ColorSpace name");
     return null;
   }
 }