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Interfaces
Learn Interfaces in ABAP with a construct-specific explanation, a unique example, a practical boundary, and a mastery check.
Interfaces is an atomic ABAP topic inside Procedures & OO. The example below uses the actual construct named by the lesson rather than a generic placeholder.
Focus on what Interfaces changes: the input, binding, control path, object state, collection, runtime effect, or language contract. Then alter one value and verify that the behavior changes for a reason specific to this feature.
Topic-specific example
INTERFACE lif_named. METHODS name RETURNING VALUE(r) TYPE string. ENDINTERFACE.
Pay attention to the contract exposed by the type, which members belong to instances versus the type itself, and what dispatch occurs at runtime.