public boolean containsColumn(byte[] family, int foffset, int flength, byte[] qualifier,
    int qoffset, int qlength) {

    return getColumnLatestCell(family, foffset, flength, qualifier, qoffset, qlength) != null;
  }
Checks for existence of a value for the specified column (empty or not).
@param family    family name
@param foffset   family offset
@param flength   family length
@param qualifier column qualifier
@param qoffset   qualifier offset
@param qlength   qualifier length
@return true if at least one value exists in the result, false if not
hbase-client/src/main/java/org/apache/hadoop/hbase/client/Result.java