code: public static <T> boolean identityEqual (@Nullable final T aObj1, @Nullable final T aObj2)
    {
      return aObj1 == aObj2;
    }
docs: The only place where objects are compared by identity.
  
  @param aObj1
  First object. May be <code>null</code>.
  @param aObj2
  Second object. May be <code>null</code>.
  @return <code>true</code> if both objects are <code>null</code> or
  reference the same object.
  @param <T>
  Type to check.