Objects of a superclass should be replaceable with objects of its subclasses without breaking the application.
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High-level modules should not depend on low-level modules; both should depend on abstractions. Abstractions should not depend on details; details should depend on abstractions. Objects of a superclass should be replaceable with
The platform has a significant presence in Eastern Europe, often ranking high among Russian photography websites. However, it has faced several controversies: it has faced several controversies: