Default typical wrapper that wraps another MutablePicoContainer.
Parameters: delegate - Container to be decorated. throws: NullPointerException - if delegate is null.
Alternate constructor that allows specification of the Logger to
use.
Parameters: delegate - Container to be decorated. Parameters: loggingCategory - specific Log4j Logger to use. throws: NullPointerException - if delegate or log is null.
Standard message handling for cases when a null object is returned
for a given key.
Parameters: componentKey - Component key that does not exist Parameters: target - Logger to log into