@NotNull
  public static Collection<JavaModuleSourceRoot> calculateSourceRoots(final String contentRootPath) {
    if (contentRootPath == null) {
      return Collections.emptyList();
    }
    return JavaSourceRootDetectionUtil.suggestRoots(new File(contentRootPath));
  }
@NotNull
  public static Collection<JavaModuleSourceRoot> calculateSourceRoots(final String contentRootPath)