A constraint that compares the value of two stepfields.
author: Rob van Maris version: $Id: CompareFieldsConstraint.java,v 1.3 2007/12/06 08:13:36 michiel Exp $ since: MMBase-1.7
Returns a string representation of this CompareFieldsConstraint.
The string representation has the form
"CompareFieldsConstraint(inverse:<:inverse>, field:<field>,
casesensitive:<casesensitive>, operator:<operator>,
field2:<field2>)"
where