Sets a list of checked indexes for this combobox.
        
        :param      indexes | [<int>, ..]

def setCheckedIndexes(self, indexes):
        """
        Sets a list of checked indexes for this combobox.
        
        :param      indexes | [<int>, ..]
        """
        if not self.isCheckable():
            return
        
        model = self.model()
        model.blockSignals(True)
        for i in range(self.count()):
            if not self.itemText(i):
                continue
            
            item = model.item(i)
            
            if i in indexes:
                state = Qt.Checked
            else:
                state = Qt.Unchecked
                
            item.setCheckState(state)
        model.blockSignals(False)
        self.updateCheckedText()