code: def install(cls, uninstallable, prefix, path_items, root=None, warning=None):
      
      root = cls._abs_root(root)
      importables = tuple(cls._iter_importables(root=root, path_items=path_items, prefix=prefix))
      vendor_importer = cls(root=root,
                            importables=importables,
                            uninstallable=uninstallable,
                            warning=warning)
      sys.meta_path.insert(0, vendor_importer)
      _tracer().log('Installed {}'.format(vendor_importer), V=3)
      return vendor_importer
docs: Install an importer for modules found under ``path_items`` at the given import ``prefix``.
  
      :param bool uninstallable: ``True`` if the installed importer should be uninstalled and any
                                 imports it performed be un-imported when ``uninstall`` is called.
      :param str prefix: The import prefix the installed importer will be responsible for.
      :param path_items: The paths relative to ``root`` containing modules to expose for import under
                         ``prefix``.
      :param str root: The root path of the distribution containing the vendored code. NB: This is the
                       the path to the pex code, which serves as the root under which code is vendored
                       at ``pex/vendor/_vendored``.
      :param str warning: An optional warning to emit if any imports are made through the installed
                          importer.
      :return: