hannes-uppman

The second `set_start_value` in this example fails with message `ERROR: LoadError: MathOptInterface.UnsupportedAttribute{MathOptInterface.VariablePrimalStart}: Attribute MathOptInterface.VariablePrimalStart() is not supported by the model.` ```julia using JuMP using HiGHS model = Model(HiGHS.Optimizer) @variable(model, x[i=1:10],...