public static byte[] makeColumn(byte[] family, int familyOffset, int familyLength,
    byte[] qualifier, int qualifierOffset, int qualifierLength) {
    byte[] column = new byte[familyLength + qualifierLength + 1];
    System.arraycopy(family, familyOffset, column, 0, familyLength);
    column[familyLength] = COLUMN_FAMILY_DELIMITER;
    System.arraycopy(qualifier, qualifierOffset, column, familyLength + 1, qualifierLength);
    return column;
  }
Makes a column in family:qualifier form from separate byte arrays with offset and length.
<p>
Not recommended for usage as this is old-style API.
@return family:qualifier
hbase-rest/src/main/java/org/apache/hadoop/hbase/rest/model/CellModel.java