This class represent an instance of a constraint.
In general, all AMPL suffixes for a constraint are available through methods with the same name in this class. See http://www.ampl.com/NEW/suffbuiltin.html for a list of the available suffixes.
Note that, since this class represents instances of both algebraic and logical constraints, some suffixes might not be available for every instance. If a wrong suffix for the specific class of constraint is accessed, an
UnsupportedOperationException is thrown.
All the accessors in this class throw a
IllegalArgumentException if the instance has been deleted in the underlying AMPL interpreter.