<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def log_likelihood(self):
 r""" Returns the value of the log-likelihood of the converged TRAM estimate. """

        # TODO: check that we are estimated...
        return _tram.log_likelihood_lower_bound(
            self.log_lagrangian_mult, self.biased_conf_energies,
            self.count_matrices, self.btrajs, self.dtrajs, self.state_counts,
            None, None, None, None, None)