@java.lang.Override
    public boolean containsFormatConversions(java.lang.String key) {
      if (key == null) {
        throw new NullPointerException("map key");
      }
      return internalGetFormatConversions().getMap().containsKey(key);
    }
<pre>
Optional. The file format conversion map that is applied to all input
files. The map key is the original mime_type. The map value is the target
mime_type of translated documents.

Supported file format conversion includes:
- `application/pdf` to
  `application/vnd.openxmlformats-officedocument.wordprocessingml.document`

If nothing specified, output files will be in the same format as the
original file.
</pre>

<code>
map&lt;string, string&gt; format_conversions = 8 [(.google.api.field_behavior) = OPTIONAL];
</code>
java-translate/proto-google-cloud-translate-v3/src/main/java/com/google/cloud/translate/v3/BatchTranslateDocumentRequest.java