RationalBasisEJA.CartesianProduct = RationalBasisCartesianProductEJA
random_eja = ConcreteEJA.random_instance
+
+# def random_eja(*args, **kwargs):
+# J1 = ConcreteEJA.random_instance(*args, **kwargs)
+
+# # This might make Cartesian products appear roughly as often as
+# # any other ConcreteEJA.
+# if ZZ.random_element(len(ConcreteEJA.__subclasses__()) + 1) == 0:
+# # Use random_eja() again so we can get more than two factors.
+# J2 = random_eja(*args, **kwargs)
+# J = cartesian_product([J1,J2])
+# return J
+# else:
+# return J1