public static boolean isDelete(final byte type) {
    return KeyValue.Type.Delete.getCode() <= type && type <= KeyValue.Type.DeleteFamily.getCode();
  }
Return true if a delete type, a {@link KeyValue.Type#Delete} or a {KeyValue.Type#DeleteFamily}
or a {@link KeyValue.Type#DeleteColumn} KeyValue type.
hbase-common/src/main/java/org/apache/hadoop/hbase/PrivateCellUtil.java