Implement an AllowCustom option in the MultiSelect, which would make possible to select a custom value that is not present in the data.
This option is available in the Kendo UI for Angular MultiSelect:
https://www.telerik.com/kendo-angular-ui/components/dropdowns/api/multiselectcomponent#allowcustom
https://www.telerik.com/kendo-angular-ui/components/dropdowns/multiselect/custom-values
I'd like to utilize the MultiSelect's Columns as they are available in Kendo UI for jQuery.
Here is the Dojo I am referring to: https://dojo.telerik.com/@martin.tabakov@progress.com/avAvIPEM