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return { my %row = %{$self->[1]} };

    return +{ %{$self->[1]} };
#or
...
#or
    my %row = %{$self->[1]};
    return \%row;

    return { %{$self->[1]} };
    # {} interpretted as a block
...

    return \( my %row = %{$self->[1]} );
    # flattens hash and returns ref to each item