An operation representing creation of a new negative keyword list. Calling any method ([getErrors](https://developers.google.com/google-ads/scripts/docs/reference/adsapp/adsapp_negativekeywordlistoperation#getErrors), [getResult](https://developers.google.com/google-ads/scripts/docs/reference/adsapp/adsapp_negativekeywordlistoperation#getResult), or [isSuccessful](https://developers.google.com/google-ads/scripts/docs/reference/adsapp/adsapp_negativekeywordlistoperation#isSuccessful)) will cause the operation to execute and create the negative keyword list. To make the script more efficient, it's recommended that you store the operations in an array and only call these methods once you've constructed all the operations you want.

### Methods:

| Member | Type | Description |
|---|---|---|
| [getErrors()](https://developers.google.com/google-ads/scripts/docs/reference/adsapp/adsapp_negativekeywordlistoperation#getErrors) | `String[]` | Returns an empty array if the operation was successful, otherwise returns the list of errors encountered when trying to create the NegativeKeywordList. |
| [getResult()](https://developers.google.com/google-ads/scripts/docs/reference/adsapp/adsapp_negativekeywordlistoperation#getResult) | `https://developers.google.com/google-ads/scripts/docs/reference/adsapp/adsapp_negativekeywordlist` | Returns the newly created NegativeKeywordList, or `null` if the operation was unsuccessful. |
| [isSuccessful()](https://developers.google.com/google-ads/scripts/docs/reference/adsapp/adsapp_negativekeywordlistoperation#isSuccessful) | `boolean` | Returns `true` if the operation was successful. |

## `getErrors()`

Returns an empty array if the operation was successful, otherwise returns the list of errors encountered when trying to create the NegativeKeywordList.

### Return values:

| Type | Description |
|---|---|
| `String[]` | The errors that occurred during the [NegativeKeywordListOperation](https://developers.google.com/google-ads/scripts/docs/reference/adsapp/adsapp_negativekeywordlistoperation). |

## `getResult()`

Returns the newly created NegativeKeywordList, or `null` if the operation was unsuccessful.

### Return values:

| Type | Description |
|---|---|
| `https://developers.google.com/google-ads/scripts/docs/reference/adsapp/adsapp_negativekeywordlist` | The [NegativeKeywordList](https://developers.google.com/google-ads/scripts/docs/reference/adsapp/adsapp_negativekeywordlist) created by the NegativeKeywordListOperation. |

## `isSuccessful()`

Returns `true` if the operation was successful.

### Return values:

| Type | Description |
|---|---|
| `boolean` | `true` if the operation was successful. |