code: public static String separatorsToSystem(final String path)
      {
          if (path == null)
          {
              return null;
          }
          if (isSystemWindows())
          {
              return separatorsToWindows(path);
          }
          else
          {
              return separatorsToUnix(path);
          }
      }
docs: Converts all separators to the system separator.
  
  @param path the path to be changed, null ignored
  @return the updated path