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
*/
	public static String getPropValue( String elementName, String property,
			String displayName )
	{
		IChoiceSet set = getElementChoiceSet( elementName, property );
		return getValueFromChoiceSet( displayName, set );
	}
	/**
	 * Gets structure property value given element name, property name and its
	 * the property's display name.
	 * 
	 * @param structName
	 *            The design element name.
	 * @param memberName
	 *            The property name.
	 * @param displayName
	 *            The property 's display name.
	 * @return The given property 's value
	 */
	public static String getStructPropValue( String structName,
			String memberName, String displayName )
	{
		IChoiceSet set = getStructChoiceSet( structName, memberName );
		return getValueFromChoiceSet( displayName, set );
	}
	/**
	 * Gets UI display name from a choice set given the the value and the choice
	 * set name.
	 * 
	 * @param value