Retrieve a list of variables that participate in a constraint, and the associated coefficients. The result is returned as a GRBLinExpr object.
|GRBLinExpr||getRow (||GRBConstr||constr )|
constr: The constraint of interest. A GRBConstr object, typically obtained from addConstr or getConstrs.
A GRBLinExpr object that captures the set of variables that participate in the constraint.