sib-multiple : should embed data-holder children into a div to separate it from the label
Sample HTML output :
<sib-multiple widget="sib-display-labelled-links" name="links" label="Liens associés">
<label>Liens associés</label>
<sib-display-labelled-links label="" name="links" data-holder="">
<a href="http://..."></a>
</sib-display-labelled-links>
<sib-display-labelled-links label="" name="links" data-holder="">
<a href="https://..."></a>
</sib-display-labelled-links>
</sib-multiple>
Not cool to have the label in the same container as the displayed elements.