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Learn when to expose Ceylon declarations with shared visibility and when to keep them package‑private, with a decision table, trade‑off discussion, and a minimal validation example.
Goal Identify which pytest symbols are safe for plugins and test code to import without risk of breaking changes across minor versions. Constraints and uncertainty pytest re-exports internal symbols like FixtureRequest , Parser , and HookspecMarker at the top level without provisional markers. The official API reference documents only a subset as stable. No
pytest