secondaryMeasureAxisSpec property
      
      set
      secondaryMeasureAxisSpec
      (NumericAxisSpec? axisSpec) 
      
    
    
Sets the secondary measure axis for the chart, rendered on the end side of the domain axis.
Implementation
set secondaryMeasureAxisSpec(NumericAxisSpec? axisSpec) {
  _newSecondaryMeasureAxisSpec = axisSpec;
}