Angular 5 ng-select how to add two values to 'bindLabel'? : <p>I want to have ng-select with two values in property bindLabel. I have something like this:</p>

<pre><code>&lt;ng-select placeholder="{{'TASKS.FOR_WHO' | translate }}"
                           name="users"  [items]="users" bindLabel="firstName" &gt;

 &lt;/ng-select&gt;
</code></pre>

<p>But in <strong>bind label</strong> i want to have <strong>bindLabel=</strong> firstName + lastName.
Like this:</p>

<pre><code>&lt;ng-select placeholder="{{'TASKS.FOR_WHO' | translate }}"
                           name="users"  [items]="users" bindLabel="firstName+lastName"&gt;

 &lt;/ng-select&gt;
</code></pre>

<p>How to achieve this?</p>
