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bless $
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Looks up the item pointed to by reference ref and tells the item that it is now an object in the classname package - or the current package if no classname is specified. It returns the reference for convenience, since a bless is often the last thing in a constructor function. (Always use the two-argument version if the constructor doing the blessing might be inherited by a derived class. In such cases, the class you want to bless your object into will normally be found as the first argument to the constructor in question.)