@java.lang.Override
  public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
    if (((bitField0_ & 0x00000001) != 0)) {
      output.writeMessage(1, getGcsSource());
    }
    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(mimeType_)) {
      com.google.protobuf.GeneratedMessageV3.writeString(output, 2, mimeType_);
    }
    getUnknownFields().writeTo(output);
  }
<pre>
The type of the file. Currently only "application/pdf" and "image/tiff"
are supported. Wildcards are not supported.
</pre>

<code>string mime_type = 2;</code>

@return The bytes for mimeType.
java-vision/proto-google-cloud-vision-v1p2beta1/src/main/java/com/google/cloud/vision/v1p2beta1/InputConfig.java