def search(plugin_package, server_url=DEFAULT_SERVER_URL):
import pip_helpers<EOL>return pip_helpers.get_releases(plugin_package, server_url=server_url)<EOL>
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