def METHOD_NAME(self, hdu_bands="BANDS"):
    """Convert map dictionary to list of HDUs.
    Parameters
    ----------
    hdu_bands : str
        Name of the HDU with the BANDS table. Default is 'BANDS'
        If set to None, each map will have its own hdu_band
    Returns
    -------
    hdulist : `~astropy.io.fits.HDUList`
        Map dataset list of HDUs.
    """
    exclude_primary = slice(1, None)
    hdu_primary = fits.PrimaryHDU()
    hdulist = fits.HDUList([hdu_primary])
    for key, m in self.items():
        hdulist += m.METHOD_NAME(hdu=key, hdu_bands=hdu_bands)[exclude_primary]
    return hdulist