Identifying equality and inequality constraints

Missing docstring for get_equality_constraints. Check Documenter's build log for details.

Missing docstring for get_inequality_constraints. Check Documenter's build log for details.

Missing docstring for is_equality. Check Documenter's build log for details.

Missing docstring for is_inequality. Check Documenter's build log for details.

Missing docstring for set_implies_equality. Check Documenter's build log for details.

Missing docstring for set_implies_inequality. Check Documenter's build log for details.

Missing docstring for is_active. Check Documenter's build log for details.