Bug 204245 Blank column on visibility column in excel[0300]
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/internal/content/wrap/TableContentWrapper.java
* (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.report.engine.content.ITableContent#getColumnCount()
	 */
	public int getColumnCount( )
	{
		return tableContent.getColumnCount( );
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.report.engine.content.ITableContent#getFooter()
	 */
	public ITableBandContent getFooter( )
	{
		if ( footer == null )
		{
			footer = new TableBandContentWrapper( tableContent.getFooter( ) );
		}
		return footer;
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.report.engine.content.ITableContent#getHeader()
	 */
	public ITableBandContent getHeader( )
	{
		if ( header == null )
		{