def plot_source_topos(self, common_scale=None):
        """ Plot topography of the Source decomposition.

        Parameters
        ----------
        common_scale : float, optional
            If set to None, each topoplot's color axis is scaled individually. Otherwise specifies the percentile
            (1-99) of values in all plot. This value is taken as the maximum color scale.
        """
        if self.unmixing_ is None and self.mixing_ is None:
            raise RuntimeError("No sources available (run do_mvarica first)")

        self._prepare_plots(True, True)

        self.plotting.plot_sources(self.topo_, self.mixmaps_, self.unmixmaps_, common_scale)