def do_nothing_vib(image, dirname):
    """Explanation of the initialization function needed for the vibrational
    analysis in class *Dissociation*.

    This function can be used to set a cell and a calculator.

    Parameters
    ----------
    image: Atoms object
        Configuration used.
    dirname: str
        Path of the directory where output files of the vibrational analysis
        will be saved.

    """
    pass
