How to get FxSheetFrameHeaderLockArea
import FxSheetFrameHeaderLockArea from 'fontoxml-fx/src/FxSheetFrameHeaderLockArea.jsx'
A secondary layout container for a sheet frame header.
You can use this in a custom sheet frame header as well. It is designed to be just as wide as the margin on the left in a sheet frame in different contexts.
Read more in the "Configure a (custom) sheet frame header" how to guide.
The system name of the product in which the sheet frame (header) is being rendered. Used to alter the look'n'feel of certain parts and/or to disable certain parts in certain contexts. For example, in context of the review product the content is read-only. So the lock widget, save widget and contextual operations are not used there.
Can be one of either: