How to make kendoMultiSelect select all items from a data source?

I use this:

var elements = new kendo.data.DataSource({ transport: { read: { type: "POST", url: '@Url.Action("GetElements_Pattern", "Plan")', data: { "planid": '@Model[0].ToString()' }, dataType: "json" } } }); elements.read(); elementslist.setDataSource(elements);

I know what to clean or choose specific:

elementslist.value ([]);

But how to specify through this operator that all elements are selected by default? Or maybe this property is separate?

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