public static UnassignRegionRequest buildUnassignRegionRequest(final byte[] regionName) {
    UnassignRegionRequest.Builder builder = UnassignRegionRequest.newBuilder();
    builder.setRegion(buildRegionSpecifier(RegionSpecifierType.REGION_NAME, regionName));
    return builder.build();
  }
Creates a protocol buffer UnassignRegionRequest
@return an UnassignRegionRequest
hbase-client/src/main/java/org/apache/hadoop/hbase/shaded/protobuf/RequestConverter.java