code: function (params) {
  
    const oThis = this
    ;
  
    params = params || {};
    params.options = params.options || {};
  
    if (params.options.returnType === 'txReceipt') {
      oThis.runInAsync = false;
    } else {
      oThis.runInAsync = true;
    }
  
  }
docs: Approve OpenST Value Contract Service
  
  @param {object} params -
  @param {object} params.options -
  @param {string} params.options.returnType - Desired return type. possible values: uuid, txHash, txReceipt. Default: txHash
  
  @constructor