def dlogpdf_dlink(self, inv_link_f, y, Y_metadata=None):
        N = Y_metadata['trials']
        return y/inv_link_f - (N-y)/(1-inv_link_f)
Check that using a non callable type fails.
dataset/ETHPy150Open SheffieldML/GPy/GPy/likelihoods/binomial.py/Binomial.dlogpdf_dlink--crossover with--dataset/ETHPy150Open nlloyd/SubliminalCollaborator/libs/twisted/test/test_usage.py/WrongTypedTestCase.test_nonCallable