code: function createPreapprovalPayment(preapproval) {
      var callback = preConditions.getCallback(arguments[arguments.length - 1]);
  
      showWarning();
  
      return preapprovalModule.create(preapproval, callback);
    }
docs: Create a preapproval payment using the preapprovalModule
  @param preapproval
  @param callback
  @returns {preapproval}