Alias allows to reuse a set definition in different places; such as i and j in the following flow balance constraint example.
int numNodes = 10;
Set i = Set("i").Represents("A node of the network").HasElementsUntil(numNodes);
Set j = i.Alias("j");
Constraint flowBal = forall(i)
| sum(over(j), x[i, j]) == sum(over(j), x[j, i]) + supply[i];
public Set Alias(
string newKey
)