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mode: string (starting with Servoy 2019.03) - Restricts the model property to: 'combobox' or 'typeahead'  for nowin developer properties view. (Default is combobox) 

This can be used only on string properties when they have "values" attribute. Setting mode to typeahead will create a typeahead property in property editor. Setting mode to combobox or skipping mode property will create a combobox in property editor.

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