Sets the element index from the map to the value v. The invoking map should be of only one dimension. Example with a Map of int: M[i in 1..5][j in 1..2] = j M.GetSub(1).Set(2, 4) will set M[1][2] to 4 instead of 2.

void Set(
	int index,
	ICumulFunctionExpr v
)