e data chunks.</p>

  
  
  <h4>Objective-C</h4>
  <pre class="highlight objective_c"><code><span class="k">-</span> <span class="p">(</span><span class="n">nonnull</span> <span class="n">instancetype</span><span class="p">)</span><span class="nf">initWithFileName</span><span class="p">:(</span><span class="n">nonnull</span> <span class="n">NSString</span> <span class="o">*</span><span class="p">)</span><span class="nv">fileName</span>
                            <span class="nf">appServiceId</span><span cl