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Language/Type: C++ queue collections STL
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Write a function named mirror that accepts a reference to a queue of strings as a parameter and appends the queue's contents to itself in reverse order. For example, if a queue named q stores {"a", "b", "c"}, the call of mirror(q); should change it to store {"a", "b", "c", "c", "b", "a"}.

Constraints: You may declare a single stack or queue as auxiliary storage.

Function: Write a C++ function as described, not a complete program.

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