code: public DataRow set(String columnCode, String value) throws UnknownColumnException {
  		for (DataColumn column : columns) {
  			if (columnCode.equals(column.getCode())) {
  				content.put(column, value);
  				return this;
  			}
  		}
  		throw new UnknownColumnException(columnCode);
  	}
docs: Sets this row's content for the given column.
  
  @param columnCode the column to set
  @param value the value to enter
  @return this row, to allow chaining
  @throws UnknownColumnException if the column doesn't exist