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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def oauth2_token_setter(remote, resp, token_type='', extra_data=None):
 """Set an OAuth2 token. The refresh_token can be used to obtain a new access_token after the old one is expired. It is saved in the database for long term use. A refresh_token will be present only if `access_type=offline` is included in the authorization code request. :param remote: The remote application. :param resp: The response. :param token_type: The token type. (Default: ``''``) :param extra_data: Extra information. (Default: ``None``) :returns: A :class:`invenio_oauthclient.models.RemoteToken` instance. """

    return token_setter(
        remote,
        resp['access_token'],
        secret='',
        token_type=token_type,
        extra_data=extra_data,
    )