code: function (data, purpose) {
      const oThis = this;
  
      for (var obj in data) {
        var lData = data[obj];
        if (typeof lData.env_var !== 'undefined' && lData.env_var.length > 0) {
          var line = "export " + lData.env_var + "='" + lData.value + "'";
          if (purpose == 'deployment' && lData.env_var == 'OST_UTILITY_GAS_PRICE') {
            line = "export " + lData.env_var + "='" + '0x0' + "'";
          }
          fileManager.append(setupConfig.env_vars_file, line);
        }
      }
    }
docs: Populate all address related env variables
  
  @params {object} data - allowed level is hash of hash, with non-blank "env_var" key and "value" key