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$x = My::Module->new(){
  foo => 'bar',
  baz => qw( bax bof )
}

foreach ( @{ $self->{'baz'} } ) {
            # some code
        }

$x = My::Module->new(){
  foo => 'bar',
  baz => qw( bax bof )
}

$x = My::Module->new(){
  foo => 'bar',
  baz => [ 'bax' , 'bof']
}