Returns True if the writer has been closed.</p>
</dd></dl>

<dl class="py method">
<dt class="sig sig-object py" id="bosdyn.bddf.block_writer.BlockWriter.write_header">
<span class="sig-name descname"><span class="pre">write_header</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">annotations</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="../../../../../_modules/bosdyn/bddf/block_writer.html#BlockWriter.write_header"><