Hello!

Today, we are going to discuss introspection and private namespaces in AS3/Flex!

The motivation to use private namespaces in the context of introspection is to be able to expose API implemented in your class in a way that is not public (everyone can use it), protected (only inheriting classes can use it) or private (only the class can use it).

Consider this: You are implementing a framework, and one of the classes (ClassA) is used both by the framework users (external) and within the framework (internal). That means that all the functionality in ClassA that is intended for external use must be public. Unfortunately, so does the functionality intended for internal use.