'Save the source estimates to a file.
Parameters
fname : string
The stem of the file name. The stem is extended with "-vl.stc"
or "-vl.w".
ftype : string
File format to use. Allowed values are "stc" (default) and "w".
The "w" format only supports a single time point.
verbose : bool, str, int, or None
If not None, override default verbose level (see
:func:`mne.verbose` and :ref:`Logging documentation <tut_logging>`
for more). Defaults to self.verbose.'

@verbose
def save(self, fname, ftype='stc', verbose=None):

    if (ftype not in ['stc', 'w']):
        raise ValueError(('ftype    must    be    "stc"    or    "w",    not    "%s"' % ftype))
    if (ftype == 'stc'):
        logger.info('Writing    STC    to    disk...')
        if (not (fname.endswith('-vl.stc') or fname.endswith('-vol.stc'))):
            fname += '-vl.stc'
        _write_stc(fname, tmin=self.tmin, tstep=self.tstep, vertices=self.vertices, data=self.data)
    elif (ftype == 'w'):
        logger.info('Writing    STC    to    disk    (w    format)...')
        if (not (fname.endswith('-vl.w') or fname.endswith('-vol.w'))):
            fname += '-vl.w'
        _write_w(fname, vertices=self.vertices, data=self.data)
    logger.info('[done]')
