code: public static void ensureClassLoaderConsistency(Class<?> existingClass,
                                                    ClassLoader classLoader) {
      Class<?> loadedClass;
      try {
        loadedClass = Class.forName(existingClass.getName(), true, classLoader);
      } catch (ClassNotFoundException e) {
        return; // let class loading fail some where else.
      }
  
      if (!loadedClass.equals(existingClass)) {
        throw new RuntimeException("The class loader is incosistent with the "
                + "class loader that initially loaded "
                + existingClass.getClass()
                + ". This can lead to various unexpected side effects.");
  
      }
    }
docs: Ensures the <code>classLoader</code> is 'consistent' with the original
  class loader that created <code>existingClass</code>. Asserts<br>
  <code>classLoader.loadClass(existingClass.getName()) == existingClass</code>.
  <p>
  
  If classLoader fails to load the class, this returns silently.<br>
  Throws a RuntimeException with detailed message if the consistency
  check fails.
  
  @param existingClass
  @param classLoader