QFormBuilder::save has a big bug!

there is a big bug in QFormBuilder.

if save a complexWidget(like QTextEdit ,QTableView etc) , it will save all children of the complexWidget as a sampleWidget(like qscrollbar widget etc).

src:
--------------------------------------------------------
mywindow.h
#include <QDialog>
#include <QCloseEvent>
class QVBoxLayout;
class QLineEdit;
class MyWindow:public QDialog
{
Q_OBJECT
public:
MyWindow(QWidget *parent = 0);

protected:
QLineEdit *le;
QVBoxLayout *v1;

void closeEvent ( QCloseEvent * event ) ;
};

---------------------------------------------------------
mywindow.cpp
MyWindow::MyWindow(QWidget *parent )
:QDialog(parent)
{
QTextEdit *te = new QTextEdit;
v1 = new QVBoxLayout;

v1->addWidget(te);
this->setLayout(v1);
}

void MyWindow::closeEvent ( QCloseEvent * e )
{
QFormBuilder builder;

QFile file("./myWndow.ui");
file.open(QFile::WriteOnly);
builder.save(&file,this);
QDialog::closeEvent(e);
}