lPartial/release"><div class="symbol monospace"><span class="token keyword">open </span><span class="token keyword">override </span><span class="token keyword">fun </span><a href="retain.html"><span class="token function">retain</span></a><span class="token punctuation">(</span><span class="token punctuation">)</span></div><p class="paragraph">Retain the video frame buffer. Use when shared ownership of the buffer is desired (e.g. when passing to separate thread), otherwise the frame may be spuriously releas