private com.google.protobuf.MapField<java.lang.String, java.lang.String>
        internalGetMutableModels() {
      if (models_ == null) {
        models_ = com.google.protobuf.MapField.newMapField(ModelsDefaultEntryHolder.defaultEntry);
      }
      if (!models_.isMutable()) {
        models_ = models_.copy();
      }
      bitField0_ |= 0x00000008;
      onChanged();
      return models_;
    }
<pre>
Required. Specify up to 10 language codes here.
</pre>

<code>repeated string target_language_codes = 3 [(.google.api.field_behavior) = REQUIRED];
</code>

@param value The bytes of the targetLanguageCodes to add.
@return This builder for chaining.
java-translate/proto-google-cloud-translate-v3/src/main/java/com/google/cloud/translate/v3/BatchTranslateTextRequest.java