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>
Required. The IANA standard MIME type of the source data.
</pre>

<code>string mime_type = 1 [(.google.api.field_behavior) = REQUIRED];</code>

@return The bytes for mimeType.
java-vertexai/proto-google-cloud-vertexai-v1/src/main/java/com/google/cloud/vertexai/api/Blob.java