TypedString :: isCollection - Typed string contains a collection
The function returns true, when the typed string is a property that representsa collection of values or instances. Usually, the string value for a collection is empty. Subordinated elements are instances, values or collections. In case of named properties,elementName() returns the property name.
Return value: Success ( bool )
The value is true when the function was executed successfully. Otherwise the value is set to false.