public com.google.protobuf.ByteString getMimeTypeBytes() {
      java.lang.Object ref = mimeType_;
      if (ref instanceof String) {
        com.google.protobuf.ByteString b =
            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
        mimeType_ = b;
        return b;
      } else {
        return (com.google.protobuf.ByteString) ref;
      }
    }
<pre>
The type of the file. Currently only "application/pdf", "image/tiff" and
"image/gif" are supported. Wildcards are not supported.
</pre>

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

@return The bytes for mimeType.
java-vision/proto-google-cloud-vision-v1p4beta1/src/main/java/com/google/cloud/vision/v1p4beta1/InputConfig.java