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From a page move: This is a redirect from a page that has been moved (renamed). This page was kept as a redirect to avoid breaking links, both internal and external, that may have been made to the old page name.
At one point in time, this page was flagged by AarghBot, because it appeared that someone had performed a cut-and-paste move from this page to Interface (object-oriented programming). However, but a human has double-checked it and found that this is not the case.
When appropriate, protection levels are automatically sensed, described and categorized.