code: public LaContainer build(String path, ClassLoader classLoader) {
          final ClassLoader oldLoader = Thread.currentThread().getContextClassLoader();
          try {
              if (classLoader != null) {
                  Thread.currentThread().setContextClassLoader(classLoader);
              }
              return build(path);
          } finally {
              Thread.currentThread().setContextClassLoader(oldLoader);
          }
      }
docs: as default