Why is this an issue?

Loggers should be:

• private: not accessible outside of their parent classes. If another class needs to log something, it should instantiate its own logger.
• static: not dependent on an instance of a class (an object). When logging something, contextual information can of course be provided in the messages but the logger should be created at class level to prevent creating a logger along with each object.
• const: created once and only once per class.

Noncompliant code example

With the default regular expression LOG(?:GER)?:

public const logger:ILogger = LogUtil.getLogger(MyClass);

Compliant solution

private static const LOG:ILogger = LogUtil.getLogger(MyClass);