public Builder clearModels() {
      bitField0_ = (bitField0_ & ~0x00000008);
      internalGetMutableModels().getMutableMap().clear();
      return this;
    }
<pre>
Optional. The models to use for translation. Map's key is target language
code. Map's value is model name. Value can be a built-in general model,
or an AutoML Translation model.

The value format depends on model type:

- AutoML Translation models:
  `projects/{project-number-or-id}/locations/{location-id}/models/{model-id}`

- General (built-in) models:
  `projects/{project-number-or-id}/locations/{location-id}/models/general/nmt`,


If the map is empty or a specific model is
not requested for a language pair, then default google model (nmt) is used.
</pre>

<code>map&lt;string, string&gt; models = 4 [(.google.api.field_behavior) = OPTIONAL];</code>
java-translate/proto-google-cloud-translate-v3beta1/src/main/java/com/google/cloud/translate/v3beta1/BatchTranslateTextRequest.java