| required Connects the field to a data source. Options are populated via the configured data source. Use the fully qualified class name or the |
| optional, default is Vaadin For this to work, you have to set the |
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| required Connects the field to a data source. Options are populated via the configured data source. Use the fully qualified class name or the |
| optional, default is Vaadin For this to work, you have to set the |