@Nullable
  public static VirtualFile getSitePackagesDirectory(@NotNull Sdk pythonSdk) {
    final VirtualFile libDir;
    if (isVirtualEnv(pythonSdk)) {
      libDir = PySearchUtilBase.findVirtualEnvLibDir(pythonSdk);
    }
    else {
      libDir = PySearchUtilBase.findLibDir(pythonSdk);
    }
    return libDir != null ? libDir.findChild(PyNames.SITE_PACKAGES) : null;
  }
@Nullable
  public static VirtualFile getSitePackagesDirectory(@NotNull Sdk pythonSdk)