ascendingText
Specifies text for the context menu item that sets an ascending sort order in a column.
                        Type:
                    
                
                    Default Value: 'Sort Ascending'
                
        clearText
Specifies text for the context menu item that clears sorting settings for a column.
                        Type:
                    
                
                    Default Value: 'Clear Sorting'
                
        descendingText
Specifies text for the context menu item that sets a descending sort order in a column.
                        Type:
                    
                
                    Default Value: 'Sort Descending'
                
        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.
                        Type:
                    
                
                    Default Value: true
                
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