Qt Override.

def headerData(self, section, orientation, role=Qt.DisplayRole):
        """Qt Override."""
        if role == Qt.TextAlignmentRole:
            if orientation == Qt.Horizontal:
                return to_qvariant(int(Qt.AlignHCenter | Qt.AlignVCenter))
            return to_qvariant(int(Qt.AlignRight | Qt.AlignVCenter))
        if role != Qt.DisplayRole:
            return to_qvariant()
        if orientation == Qt.Horizontal:
            if section == LANGUAGE:
                return to_qvariant(_("Language"))
            elif section == ADDR:
                return to_qvariant(_("Address"))
            elif section == CMD:
                return to_qvariant(_("Command to execute"))
        return to_qvariant()