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# input file for testing filter_example.pl
use Method::Signatures::Simple;

 method foo1 { $self->bar }

       # with signature
    method foo2($bar, %opts) { $self->bar(reverse $bar) if $opts{rev};
    }

    # attributes
    method foo3 : lvalue { $self->{foo} 
}

 # change invocant name
    method 
foo4 ($class: $bar) { $class->bar($bar) }