Method removeColumns

src/backend/worksheet/TreeModel.cpp:93–104

}

bool TreeItem::removeColumns(int position, int columns) {
	if (position < 0 || position + columns > itemData.size())
		return false;

	for (int column = 0; column < columns; ++column)
		itemData.remove(position);

	for (auto* childItem : childItems)
		childItem->removeColumns(position, columns);

	return true;
}

bool TreeItem::setData(int column, const QVariant& value) {
	if (column < 0 || column >= itemData.size())