Course of Raku / Objects, I/O, and exceptions / Classes and objects / Roles / Adding a role to an object

Quiz — Roles

What does the following program print?

role Flyer {
    method fly { 'up we go' }
}

class Bird does Flyer {
}

say Bird.new.fly;

0	Flyer
1	up we go
0	True
0	an error

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