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Actually, the task can be split in two subtasks: — retrieving offset in the form which Vaadin can provide (integer number of milliseconds); — formatting it so that we could construct ZoneId.

If you compose a sophisticated application with vaadin, you may face an interesting issue: values in the grid got updated (say, via HTTP) and you can see them in the corresponding rows and columns, but you can’t read the actual values when selection listener gets triggered. I will tell how to workaround this issue.