Bug 204245 Blank column on visibility column in excel[0300]
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/executor/buffermgr/TableContentLayout.java
{
			if ( LayoutUtil.isHidden( ( (IContent) parent ), format, context
					.getOutputDisplayNone( ) ) )
			{
				return false;
			}
		}
		IColumn column = cell.getColumnInstance( );
		if ( column == null )
		{
			return false;
		}
		if ( isColumnHidden( column ) )
		{
			return false;
		}
		return true;
	}
	protected class UnresolvedRow
	{
		Row row;
		boolean invalidFlags[];
		public UnresolvedRow( Row row )
		{
			this.row = row;
			invalidFlags = new boolean[row.cells.length];
		}
		
		protected int getRowSpan(Row row, int originalRowSpan)
		{