code: public TableModel removeFKey(String fkeyName) {
  		checkReadOnly();
  		List<FKeyModel> fkeys = getFkeyConstraints();
  		Iterator<FKeyModel> fkeyIter = fkeys.iterator();
  		while (fkeyIter.hasNext())
  			if (fkeyIter.next().getFkeyName().equalsIgnoreCase(fkeyName))
  				fkeyIter.remove();
  		return this;
  	}
docs: Remove a FKey by given fkeyName