+=item payment_payby
+
+Returns all values of payby that can be used by payments.
+
+=cut
+
+sub payment_payby {
+ my $self = shift;
+ grep { ! exists $hash{$_}->{cust_pay} } $self->payby;
+}
+
+=item payment_payby2longname
+
+Returns hash, keys are L</payment_payby> types, values are payby longname.
+
+=cut
+
+sub payment_payby2longname {
+ my $self = shift;
+ map { $_ => $hash{$_}->{longname} } $self->payment_payby;
+}
+
+=item payment_payby2payname
+
+Returns hash, keys are L</payment_payby> types, values are payby payname.
+
+=cut
+
+sub payment_payby2payname {
+ my $self = shift;
+ map { $_ => $self->payname($_) } $self->payment_payby;
+}
+