Sets whether or not this toolbar is shadowed.
        
        :param      state | <bool>

def setShadowed(self, state):
        """
        Sets whether or not this toolbar is shadowed.
        
        :param      state | <bool>
        """
        self._shadowed = state
        if state:
            self._colored = False
        
        for child in self.findChildren(XToolButton):
            child.setShadowed(state)