@java.lang.Override
    public final Builder setUnknownFields(final com.google.protobuf.UnknownFieldSet unknownFields) {
      return super.setUnknownFields(unknownFields);
    }
<pre>
Optional. Specifies the translated document's mime_type.
If not specified, the translated file's mime type will be the same as the
input file's mime type.
Currently only support the output mime type to be the same as input mime
type.
- application/pdf
- application/vnd.openxmlformats-officedocument.wordprocessingml.document
- application/vnd.openxmlformats-officedocument.presentationml.presentation
- application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
</pre>

<code>string mime_type = 3 [(.google.api.field_behavior) = OPTIONAL];</code>

@param value The bytes for mimeType to set.
@return This builder for chaining.
java-translate/proto-google-cloud-translate-v3beta1/src/main/java/com/google/cloud/translate/v3beta1/DocumentOutputConfig.java