code: boolean addSystemClasspathEntry(final String pathEntry, final ClassLoader classLoader) {
          if (classpathEntryUniqueResolvedPaths.add(pathEntry)) {
              order.add(new SimpleEntry<>(pathEntry, classLoader));
              return true;
          }
          return false;
      }
docs: Add a system classpath entry.
  
  @param pathEntry
  the system classpath entry -- the path string should already have been run through
  FastPathResolver.resolve(FileUtils.CURR_DIR_PATH, path
  @param classLoader
  the classloader
  @return true, if added and unique