public static boolean isDelete(final Cell cell) {
    return PrivateCellUtil.isDelete(PrivateCellUtil.getTypeByte(cell));
  }
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/CellUtil.java