assert PropertyType.STRUCT_REF_TYPE == prop.getTypeCode( );
assert IPropertyType.STRUCT_REF_TYPE == prop.getTypeCode( );
	private boolean checkStructureReference( Module module,			DesignElement element, String propName )	{		assert !StringUtil.isBlank( propName );		// Is the value set?		Object value = element.getLocalProperty( module, propName );		if ( value == null )			return true;		// This must be a structure reference property.		ElementPropertyDefn prop = element.getPropertyDefn( propName );		assert PropertyType.STRUCT_REF_TYPE == prop.getTypeCode( );		// Attempt to resolve the reference.		StructRefValue ref = (StructRefValue) value;		ref = element.resolveStructReference( module, prop );		return ref.isResolved( );	}