src/Generator.php
public function generate(Finder $finder)
    {
        foreach ($finder as $file) {
            $mutable = new Mutable($file->getRealpath());

            $this->mutables[] = $mutable;
        }
    }
public function generate(Finder $finder)
    {
        foreach ($finder as $file) {
            $mutable = new Mutable($file->getRealpath());

            $this->mutables[] = $mutable;
        }
    }
Given a file iterator pass each to a \Humbug\Mutable
instance which is used to generate mutations and store
the instructions for applying and reversing them as
a set of mutables (instances of \Humbug\Mutation).

@return void