protected Object reduceConstraintSpec() {
Expression[] expressions = new Expression[length()/2-1];
for(int i=0;i<expressions.length;++i)
expressions[i] = (Expression)get(2*i+1);
return expressions;
protected Object reduceConstraintSpec() {
Expression[] expressions = new Expression[length()/2-1];
for(int i=0;i<expressions.length;++i)
expressions[i] = (Expression)get(2*i+1);
return expressions;