def find_tag(tag_wrapper, tag_name):
    """Search through a collection of tags and return the tag
    with the given name

    :param tag_wrapper: A collection of tags in the Google Tag Manager
                              List Response format
    :type tag_wrapper: dict
    :param tag_name: The name of a tag to find
    :type tag_name: str
    :return: A Google Tag Manager tag
    :rtype: dict
    """
    if "tag" in tag_wrapper:
        for tag in tag_wrapper["tag"]:
            if tag["name"] == tag_name:
                return tag
    return None