AlexanderGrom

// Pattern Specification
//
// In the following example, we are retrieving invoices and sending them to a collection agency if
//  1. they are overdue,
//  2. notices have been sent, and
//  3. they are not already with the collection agency.
// This example is meant to show the end result of how the logic is 'chained' together.
//
// This usage example assumes a previously defined OverdueSpecification class
// that is satisfied when an invoice's due date is 30 days or older,