Describir: Package and p.o.p. structures.

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    ___    |  ___||  /_   _//   / _ \\   \ \\/ //   / _ \\  |  __ \\  
   /   ||  | ||__    `-| |,-   / //\ \\   \   //   | / \ || | |  \ || 
  | [] ||  | ||__      | ||   |  ___  ||  / . \\   | \_/ || | |__/ || 
   \__ ||  |_____||    |_||   |_||  |_|| /_//\_\\   \___//  |_____//  
    -|_||  `-----`     `-`'   `-`   `-`  `-`  --`   `---`    -----`   
     `-`                                                              
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