Missing features

[odow]

These should all be covered by unit tests in MOIT.

TODOs

• get ConstraintSet of a ScalarAffineFunction-inInterval constraint.
• get ConstraintSet of a ScalarQuadraticFunction constraint.
• get ConstraintFunction of a ScalarQuadraticFunction constraint.
• delete ScalarQuadraticFunction constraint.

Objective

• get quadratic function
• modify quadratic function? Not MOI
• single variable

Variables

• Basis stuff?

Constraints

• modify Proposal: change API for modifications jump-dev/MathOptInterface.jl#360
• transform
• Stop shifting constants around Document constraint primal better jump-dev/MathOptInterface.jl#358 (comment)

[joaquimg]

I think we can leave basis stuff for later.
Same for modifying quadratic objective (just delete and add a new one for now).

Once #23 is merged we only need to decide about:

• modify
• transform