<p><code>buffer_p_batch Optional[float]</code>: percentage of each batch that
should come from the buffer. If None, value is inferred from
<code>p_batch</code> values in <code>samplers</code></p>
</li>
<li><p><code>log Optional[Log]</code>: custom log. If None, standard <a href="/mrl/logging.html#Log"><code>Log</code></a> is used</p>
</li>
</ul>

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