public static CellVisibility toCellVisibility(ClientProtos.CellVisibility proto) {
    if (proto == null) return null;
    return new CellVisibility(proto.getExpression());
  }
Convert a protocol buffer CellVisibility to a client CellVisibility
@return the converted client CellVisibility
hbase-client/src/main/java/org/apache/hadoop/hbase/shaded/protobuf/ProtobufUtil.java