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<h5h6>2.2.1 Define the internal implementation class (This the class BookFinderImplementation <u>will not be exposed to the outside world</u>)</h5h6>
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The bundle export the package cs.ecl.osgi.simple.bookfinderservice <strong>Meanwhile, the implementation package - cs.ecl.osgi.simple.bookfinderservice.internals - <strong>is hidden to the outside world and can be change dynamically</strong>and can be changed dynamically anytime a better implementation is created.