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      <span class="note">(optional)</span>

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  <section class="docstring">

      <div class="specs">

          <pre translate="no"><span class="attribute">-callback</span> handle_part(Msg, From, ZoneData, State) -> Result
                         when
                             From :: <a href="#t:session_pid/0">session_pid</a>(),
                             Msg :: <a href="https://www.erlang.org/doc/apps/