Gurobi column object. A column consists of a list of coefficient, constraint pairs. Columns are used to represent the set of constraints in which a variable participates, and the associated coefficients. They are temporary objects that typically have short lifespans.
You generally build columns by starting with an empty column (using the GRBColumn constructor), and then adding terms. Terms can be added individually, using AddTerm, or in groups, using AddTerms. Terms can also be removed from a column, using Remove.