@Override public Integer[] getUniqueIdentifierArray()
   {
      Integer[] result = new Integer[m_table.size()];
      int index = 0;
      for (Integer value : m_table.keySet())
      {
         result[index] = value;
         ++index;
      }
      return (result);
   }
@ Override public Integer [ ] getUniqueIdentifierArray ( ) { Integer [ ] result = new Integer [ m_table . size ( ) ] ; int index = 0 ; for ( Integer value : m_table . keySet ( ) ) { result [ index ] = value ; ++ index ; } return ( result ) ; }
This method returns an array containing all of the unique identifiers
for which data has been stored in the Var2Data block.

@return array of unique identifiers