code: public void addForeignKey(final String _fkName,
                                final String _colName,
                                final String _refTableName,
                                final String _refColName,
                                final boolean _cascade)
      {
          this.fkMap.put(_fkName.toUpperCase(),
                         new ForeignKeyInformation(_fkName, _colName, _refTableName, _refColName, _cascade));
      }
docs: Fetches all foreign keys for this table.
  
  @param _fkName       name of foreign key
  @param _colName      name of column name
  @param _refTableName name of referenced SQL table
  @param _refColName   name of column within referenced SQL table
  @param _cascade      delete cascade activated
  @see #fkMap