Terms for subject Microsoft containing interface methods

English	Russian
base interface's default method	метод базового интерфейса с реализацией по умолчанию (microsoft.com Alex_Odeychuk)
default implementations of methods in an interface	реализация методов интерфейса по умолчанию (Alex_Odeychuk)
default interface method	метод интерфейса с реализацией по умолчанию (InfoWorld, 2021 • Default interface methods are methods in an interface that contain concrete implementations. If the class that extends the interface doesn't implement the method, the default implementation of the method will be used from the interface. This is a useful feature as it helps developers add methods to future versions of an interface without breaking the existing functionality, i.e., the existing implementations of that interface. Alex_Odeychuk)