preheat\_open.supplypoint.BillingContext ======================================== .. currentmodule:: preheat_open.supplypoint .. autoclass:: BillingContext :members: :show-inheritance: :inherited-members: .. automethod:: __init__ .. rubric:: Attributes .. autosummary:: ~BillingContext.NONE ~BillingContext.ADD_TO_BILL ~BillingContext.SUBTRACT_FROM_BILL