code: public void addIncludedPackageNames(String _packageName) {
          if (_packageName.endsWith(".")) {
              includePackageNames.add(_packageName);
              ComponentRegistry.getInstance().addPackageToIncludeList(_packageName);
          }
      }
docs: Add a package name which should be loaded with this classloader.
  
  @param _packageName name of the package, has to end with '.'