@SuppressWarnings("unused") private void appendToClassPathForInstrumentation(String path){
  assert (Thread.holdsLock(this));
  super.addURL(getFileURL(new File(path)));
}

@ SuppressWarnings ( "unused" ) private void appendToClassPathForInstrumentation ( String path ) { assert ( Thread . holdsLock ( this ) ) ; super . addURL ( getFileURL ( new File ( path ) ) ) ; }
this class loader supports dynamic additions to the class path at runtime .
