JavaScript/jQuery RangeSelector - scale.marker.label
Defines the properties that can be set for the text that is displayed by the scale markers.
                        Type:
                    
        customizeText
Specifies a callback function that returns the text to be displayed in scale markers.
                        Type:
                    
        
                    Return Value: 
                
                The text for the label to display.
                        Cannot be used in themes.
                    
        NOTE
  As an alternative to the function’s parameter you can use the 
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