Bug 120317 Set "dimension" property to 3D in "properties" view, error appears in layout editor.
Description: Set "dimension" property to 3D in "properties" view, error appears in layout editor. Steps to reproduce: 1. Add a 2D chart in property editor. 2. Set its dimension property to "three-dimension" in properties view. 3. Error appears in chart.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/api/ExtendedItemHandle.java
assert propHandle != null;
		return propHandle.iterator( );
	}
	/**
	 * Returns the scripts.
	 * 
	 * @param scriptPropName
	 *            the script property name
	 * @return the script
	 */
	public String getScript( String scriptPropName )
	{
		return getStringProperty( scriptPropName );
	}
	/**
	 * Sets the scripts on the extension element.
	 * 
	 * @param scriptPropName 
	 *            the script property name
	 * @param theScript
	 *            the script to be set
	 * @throws SemanticException
	 *             if fail to set the scripts
	 */
	public void setScript( String scriptPropName, String theScript )
			throws SemanticException
	{
		setStringProperty( scriptPropName, theScript );
	}
}