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                        <p>Function that triggers write of data to descriptor. Write is called after subscribtion to <code>Observable</code> is made.</p>

<p>Observable can ends with following errors:</p>

<ul>
<li><code>BluetoothError.descriptorWriteFailed</code></li>
<li><code>BluetoothError.peripheralDisconnected</code></li>
<li><code><a href="../Enums/BluetoothError.html#/s:14R