question: public void addPriorityPackage ( String pkg ) { if ( _priorityPackages == null ) _priorityPackages = new String [ 0 ] ; int oldLength = _priorityPackages . length ; String [ ] newPkgs = new String [ oldLength + 1 ] ; System . arraycopy ( _priorityPackages , 0 , newPkgs , 0 , oldLength ) ; if ( ! pkg . endsWith ( "." ) ) pkg = pkg + '.' ; newPkgs [ oldLength ] = pkg ; _priorityPackages = newPkgs ; }
target:  Add to the list of packages that take priority over the parent