** Control over downloads

  Find the control point for m2 using maven-wagon. At this point, inject
  a offline status parameter which is used when retrieving the specific Wagon.

  If <<<offline == true>>>:

  * If the wagon is not bound to "file://", then ignore the request and print
    a debug message.

  * If the wagon is bound to "file://" then:

 ({{{./xref/org/apache/maven/classrealm/DefaultClassRealmManager.html}source}}), using
 {{{https://codehaus-plexus.github.io/plexus-classworlds/}Plexus Classworlds}},

* Useful entry points

 * <<<Maven>>> component ({{{./apidocs/org/apache/maven/Maven.html}javadoc}}),
 with its <<<DefaultMaven>>> implementation ({{{./xref/org/apache/maven/DefaultMaven.html}source}}), to drive
 a full Maven execution session