ascendingText
Specifies text for the context menu item that sets an ascending sort order in a column.
clearText
Specifies text for the context menu item that clears sorting settings for a column.
descendingText
Specifies text for the context menu item that sets a descending sort order in a column.
showSortIndexes
Specifies whether to display sort indexes in column headers. Applies only when sorting.mode is "multiple" and data is sorted by two or more columns.
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