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

##</code><code>##

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

##</code><code>##

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

    return \my %row = %{$self->[1]};
    # \ binds tighter than =, so same as:
    # (\my %row) = %{$self->[1]};

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