How can I add an if statement to columnDefs to select either "volume" or "volume_adjusted" based on input "column" ?

 @Input() column : string = ["volume"];
 pivotMode: True,
 columnDefs: [
   {headerName: 'Maturity'; field: 'Maturity'; colId:'Maturity', width: 100, rowGroup; true },
   {headerName: 'price'; field: 'price'; colId:'price', width: 100, pivot: true},
   {headerName: 'volume'; field: 'volume'; colId:'volume', width: 100, aggFunc: 'first' },
   {headerName: 'volume_adjusted'; field: 'volume_adjusted'; colId:'volume_adjusted', width: 100, aggFunc: 'first' }
 ],