Bug 134949 Themes nest in other library
Details: Themes nest in other library Step: 1. Library A use LibraryB, and Library B has a themes 2. Report design use Library A 3. I open the Library tree of A in library explorer and drop the themes from B into layout. Actual result: It pop up an error message and said that the library namespace "B" exists already. Exception result: I don't konw if I can use by this method. But I think it is a method user may be used.
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/ui/views/attributes/providers/ChoiceSetFactory.java
*            The value corresponding to the display name.
	 * @param set
	 *            The choice set name from which to get display name.
	 * @return The display name of the given value
	 */
	public static String getDisplayNameFromChoiceSet( String value,
			IChoiceSet set )
	{
		String name = value;
		if ( set == null )
		{
			return name;
		}
		IChoice[] choices = set.getChoices( );
		if ( choices == null )
		{
			return name;
		}
		for ( int i = 0; i < choices.length; i++ )
		{
			if ( choices[i].getName( ).equals( value ) )
			{
				return choices[i].getDisplayName( );
			}
		}
		return name;
	}
	/**
	 * Gets the value from a choice set given the UI display name and the choice
	 * set name.