@abc.abstractproperty<EOL><INDENT>def is_calibrated(self):<DEDENT>
raise NotImplementedError()<EOL>
Returns `True` if Markov chain converges to specified distribution.

        `TransitionKernel`s which are "uncalibrated" are often calibrated by
        composing them with the `tfp.mcmc.MetropolisHastings` `TransitionKernel`.