Bug 186940 Style name in theme cannot be identify by auto when reopen the library[01]
Description: Style name in theme cannot be identify by auto when reopen the library[01] Step: 1.Open a library and add a theme 2.New a style on the theme and use the default name that is "NewStyle" 3.Save the library, close it and reopen it again. 4.New another style on the same theme Actual result: The default style name on second times is also "NewStyle" Exception result: The default style name on second times is "NewStyle1"
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/elements/Theme.java
if( operation == null )
			operation = new CssStyleSheetAdapter() ;
		operation.addCss( css );
	}
	
	/**
	 * Insert the given css to the given position
	 * @param css
	 * @param index
	 */
	
	public void insertCss( CssStyleSheet css , int index )
	{
		if( operation == null )
			operation = new CssStyleSheetAdapter() ;
		operation.insertCss( css, index );
	}
	/**
	 * Returns only csses this module includes directly.
	 * 
	 * @return list of csses. each item is <code>CssStyleSheet</code>
	 */
	public List getCsses( )
	{
		if( operation == null )
			return Collections.EMPTY_LIST;
		return operation.getCsses( );
	}
}