*,LinearVariableCollection,numeric-method
                        Multiply
*,LinearVariableSum,numeric-method
                        Multiply
*,numeric,LinearVariableCollection-method
                        Multiply
*,numeric,LinearVariableSum-method
                        Multiply
+,LinearVariableCollection,LinearVariableCollection-method
                        Plus
+,LinearVariableCollection,LinearVariableSum-method
                        Plus
+,LinearVariableCollection,missing-method
                        Unary Plus
+,LinearVariableCollection,numeric-method
                        Plus
+,LinearVariableSum,LinearVariableCollection-method
                        Plus
+,LinearVariableSum,LinearVariableSum-method
                        Plus
+,LinearVariableSum,missing-method
                        Unary Plus
+,LinearVariableSum,numeric-method
                        Plus
+,numeric,LinearVariableCollection-method
                        Plus
+,numeric,LinearVariableSum-method
                        Plus
-,LinearVariableCollection,LinearVariableCollection-method
                        Minus
-,LinearVariableCollection,LinearVariableSum-method
                        Minus
-,LinearVariableCollection,missing-method
                        Unary Minus
-,LinearVariableCollection,numeric-method
                        Plus
-,LinearVariableSum,LinearVariableCollection-method
                        Minus
-,LinearVariableSum,LinearVariableSum-method
                        Minus
-,LinearVariableSum,missing-method
                        Unary Minus
-,LinearVariableSum,numeric-method
                        Minus
-,numeric,LinearVariableCollection-method
                        Minus
-,numeric,LinearVariableSum-method
                        Minus
/,LinearVariableCollection,numeric-method
                        Division
/,LinearVariableSum,numeric-method
                        Division
LinearVariable-class    An S4 class that represents a single variable
LinearVariableCollection-class
                        An S4 class that represents a collection of
                        variables
LinearVariableSum-class
                        Holds a sum of a constant and a linear variable
                        collection
MILPModel               Create a new MILP Model
MIPModel                Create a new MIP Model
[,LinearVariableCollection,ANY,ANY,missing-method
                        Subset model variables
add_constraint          Add a constraint
add_variable            Add a variable to the model
as_colwise              As_colwise
colwise                 Format variables colwise
extract_constraints     Extract the constraint matrix, the right hand
                        side and the sense from a model
get_column_duals        Gets the column duals of a solution
get_row_duals           Gets the row duals of a solution
get_solution            Get variable values from a solution
nconstraints            Number of variables (rows) of the model
new_solution            Create a new solution
nvars                   Number of variables of a model
objective_function      Extract the objective function from a model
objective_value         Extract the numerical objective value from a
                        solution
ompr                    A package to Model (Mixed) Integer Programs
set_bounds              Set the bounds of a variable
set_objective           Set the model objective
solve_model             Solve a model
solver_status           Get the solver status from a solution
sum_expr                Construct a sum expression
variable_bounds         Variable lower and upper bounds of a model
variable_keys           Get all unique names of the model variables
variable_types          Variable types of a model
