code: private OsType determineOsType(String imageId) {
          InspectImageResponse ir = getClient().inspectImageCmd(imageId).exec();
          if ("linux".equalsIgnoreCase(ir.getOs())) {
              LOG.trace("Detected LINUX operating system for image: {}", imageId);
              return OsType.LINUX;
          } else if ("windows".equalsIgnoreCase(ir.getOs())) {
              LOG.trace("Detected WINDOWS operating system for image: {}", imageId);
              return OsType.WINDOWS;
          } else {
              LOG.trace("Detected OTHER operating system ({}) for image: {}", ir.getOs(), imageId);
              return OsType.OTHER;
          }
      }
docs: Determine the operating system associated with an image.