It is the invocation target of the proxy class defined in the
manageMacOSenvironment
method. The proxy is defined as the
dispatcher of calls to the com.apple.eawt.ApplicationListener, there
instantiated through reflection. It receives the calls to the listener
methods and specifically manages the call to the
handleAbout
method, in order to address the locally defined method
Application.showAboutDialog()
. Secondarily it invokes the
setHandled
method
of the
ApplicationEvent
object received in
args[0]
.