def is_ready_to_next_step(self):
        """Check if the step is complete. If so, there is
            no reason to block the Next button.

        :returns: True if new step may be enabled.
        :rtype: bool
        """
        return (bool(self.rbAggLayerFromCanvas.isChecked()
                     or self.rbAggLayerFromBrowser.isChecked()
                     or self.rbAggLayerNoAggregation.isChecked()))
Check if the step is complete. If so, there is
            no reason to block the Next button.

        :returns: True if new step may be enabled.
        :rtype: bool