useoximo_expr::ExprId;/// Whether the model minimizes or maximizes its objective.
#[derive(Copy, Clone, Debug, PartialEq, Eq)]pubenumObjectiveSense{
Minimize,
Maximize,}/// The model's objective: an expression to optimize and the direction.
#[derive(Clone, Debug)]pubstructObjective{/// Root node of the objective expression in the model's [`oximo_expr::ExprArena`].
pubexpr: ExprId,
pubsense: ObjectiveSense,
}