“frob every method call”

class Library {

Hashtable books = new Hashtable(100);

}

public Book find(User u, String title) {

frob();

if(books.containsKey(title)) {

frob();

Book b = (Book)books.get(title);

if (b != null) {

frob();

if (b.getBorrower() == null)

{frob();

b.setBorrower(u);}

return b;

}

return null;

}