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#### 15.4.4.2 The Print Command with Objective-C

The print command has also been extended to accept methods. For example:

    print -[object hash]

will tell GDB to send the `hash` message to object and print the result. Also, an additional command has been added, `print-object` or `po` for short, which is meant to print the description of an object. However, this command may only work with certain Objective-C libraries that have a particular hook function, `_NSPrintForDebugger`, defined.