return "{}" if ! @keys;
return "{$self->{hash_nl}${prefix}$self->{indent}"
. join(",$self->{hash_nl}${prefix}$self->{indent}",
return "{}" if ! @keys;
return "{$self->{hash_nl}${prefix}$self->{indent}"
. join(",$self->{hash_nl}${prefix}$self->{indent}",