[Seaside] Multi-select drop down list

[Bob Nemec]

Has anyone implemented or wrapped a multi-select dropdown list in Seaside? 
I'm looking at jQuery plugins like https://www.positronx.io/multiselect-dropdown-list-with-checkboxes-jquery-plugin/ which render fine, but I'd like to be able to better hook in to the select / unselect events. 
Shouldn't be too hard; but I'd rather not repeat work that may already have been done. 
Thanks for any info,Bob Nemec
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