def METHOD_NAME(storage_type, csv_5mb, dash_dcc):
    def fingerprint(data):
        return hashlib.sha1(data.encode("utf-8")).hexdigest()
    app = Dash(__name__)
    app.layout = html.Div(
        [
            dcc.Store(id=storage_type, storage_type=storage_type),
            html.Button("big data", id="btn"),
            html.Div(id="out"),
        ]
    )
    @app.callback(
        Output("out", "children"),
        [Input(storage_type, "modified_timestamp")],
        [State(storage_type, "data")],
    )
    def update_output(mts, data):
        if data is None:
            return "nil"
        return fingerprint(data)
    @app.callback(Output(storage_type, "data"), [Input("btn", "n_clicks")])
    def on_click(n_clicks):
        if n_clicks is None:
            raise PreventUpdate
        return csv_5mb
    dash_dcc.start_server(app)
    assert dash_dcc.find_element("#out").text == "nil"
    dash_dcc.find_element("#btn").click()
    dash_dcc.wait_for_text_to_equal("#out", fingerprint(csv_5mb))
    assert dash_dcc.get_logs() == []