def error_cutout_ma(self):
        """
        A 2D `~numpy.ma.MaskedArray` cutout from the input ``error``
        image.

        The mask is `True` for pixels outside of the source segment
        (labeled region of interest), masked pixels from the ``mask``
        input, or any non-finite ``data`` values (e.g. NaN or inf).

        If ``error`` is `None`, then ``error_cutout_ma`` is also `None`.
        """

        if self._error is None:
            return None
        else:
            return np.ma.masked_array(self._error[self._slice],
                                      mask=self._total_mask)
A 2D `~numpy.ma.MaskedArray` cutout from the input ``error``
        image.

        The mask is `True` for pixels outside of the source segment
        (labeled region of interest), masked pixels from the ``mask``
        input, or any non-finite ``data`` values (e.g. NaN or inf).

        If ``error`` is `None`, then ``error_cutout_ma`` is also `None`.