Vaadin 8 grid table first column check box

Vaadin 8 grid table first column check box.
if i select one checkbox after i use shift key the checkbox. checkbox set value true for start check box to selected end checkbox
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That feature is not included in Grid Improve grid multiselect with ctrl/shift keys · Issue #6395 · vaadin/framework · GitHub

But there is an extension in Directory GridExtensionPack Add-on - Vaadin Add-on Directory