How to use the bilby.core.utils.logger.debug function in bilby

----------
        posteriors: list
            List of pandas DataFrame objects.
        max_samples: int, opt
            Maximum number of samples to take from each posterior,
            default is length of shortest posterior chain.
        Returns
        -------
        data: dict
            Dictionary containing arrays of size (n_posteriors, max_samples)
            There is a key for each shared key in posteriors.
        """
        for posterior in posteriors:
            max_samples = min(len(posterior), max_samples)
        data = {key: [] for key in posteriors[0]}
        logger.debug(f"Downsampling to {max_samples} samples per posterior.")
        self.samples_per_posterior = max_samples
        for posterior in posteriors:
            temp = posterior.sample(self.samples_per_posterior)
            for key in data:
                data[key].append(temp[key])
        for key in data:
            data[key] = xp.array(data[key])
        return data