docs: def search(plugin_package, server_url=DEFAULT_SERVER_URL):
      '''
      Parameters
      ----------
      plugin_package : str
          Name of plugin package hosted on MicroDrop plugin index. Version
          constraints are also supported (e.g., ``"foo", "foo==1.0",
          "foo>=1.0"``, etc.)  See `version specifiers`_ reference for more
          details.
      server_url : str
          URL of JSON request for MicroDrop plugins package index.  See
          ``DEFAULT_SERVER_URL`` for default.
  
      Returns
      -------
      (str, OrderedDict)
          Name of found plugin and mapping of version strings to plugin package
          metadata dictionaries.
  
  
      .. _version specifiers:
          https://www.python.org/dev/peps/pep-0440/#version-specifiers
  
      .. versionchanged:: 0.25.2
          Import `pip_helpers` locally to avoid error `sci-bots/mpm#5`_.
  
          .. _sci-bots/mpm#5: https://github.com/sci-bots/mpm/issues/5
      '''
      import pip_helpers
  
      # Look up latest release matching specifiers.
      return pip_helpers.get_releases(plugin_package, server_url=server_url)