jacaScript Mapをfor文で処理する

環境：

GAS

qiita Practice.js

const this_spread = SpreadsheetApp.getActiveSpreadsheet();

function createMap() {
  const criteria_sheet = this_spread.getSheetByName('criteria');
  let name_map = new Map();
  for(let count = 1; count <= 4; count ++){
    let key = criteria_sheet.getRange(count,1).getValue();
    let value = criteria_sheet.getRange(count,2).getValue();
    name_map.set(key, value);
  }
  return name_map
}