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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 display_upstream_structure(structure_dict):
 """Displays pipeline structure in the jupyter notebook. Args: structure_dict (dict):
 dict returned by :func:`~steppy.base.Step.upstream_structure`. """

    graph = _create_graph(structure_dict)
    plt = Image(graph.create_png())
    display(plt)