Bug 313882 [Regression]pageoverflow plus pagebreakinternal shows different pdf pages in web viewer and preview
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/nLayout/area/impl/ContainerArea.java
{
		return isInlineStacking;
	}
	public Iterator<IArea> getChildren( )
	{
		return children.iterator( );
	}
	public void addChild( IArea area )
	{
		children.add( area );
	}
	public IArea getChild( int index )
	{
		if ( index >= 0 && index < children.size( ) )
		{
			return children.get( index );
		}
		return null;
	}
	public void addChild( int index, IArea area )
	{
		children.add( index, area );
	}
	public int indexOf( IArea area )
	{
		return children.indexOf( area );
	}
	public void removeAll( )
	{
		children.clear( );