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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 get_proposed_feature(project):
 """Get the proposed feature The path of the proposed feature is determined by diffing the project against a comparison branch, such as master. The feature is then imported from that path and returned. Args: project (ballet.project.Project):
 project info Raises: ballet.exc.BalletError: more than one feature collected """

    change_collector = ChangeCollector(project)
    collected_changes = change_collector.collect_changes()
    try:
        new_feature_info = one_or_raise(collected_changes.new_feature_info)
        importer, _, _ = new_feature_info
    except ValueError:
        raise BalletError('Too many features collected')
    module = importer()
    feature = _get_contrib_feature_from_module(module)
    return feature