def METHOD_NAME(self):
    """Testing GenericDataFilesPlotter object."""
    filepaths = [
            os.path.join(abidata.dirpath, "refs", "sio2_screening", "sio2_EM1_NLF"),
            os.path.join(abidata.dirpath, "refs", "sio2_screening", "sio2_EM1_NLF"),
    ]
    plotter = GenericDataFilesPlotter.from_files(filepaths)
    assert plotter.to_string(verbose=2)
    assert str(plotter)
    if self.has_matplotlib():
        assert plotter.plot(show=False)
        assert plotter.plot(use_index=True, show=False)