sap ui5 table get index

1.t:Table

let oTable = this.getView().byId(" ");
let selectedIndices = oTable.getSelectedIndices();

2.Table

  rearrangementData(selectedTravelList){
    
    
      if(selectedTravelList && selectedTravelList.length > 0){
    
    
          selectedTravelList.map((item,index)=>{
    
    
              item.number = index + 1;
          });
      }
  }