be set to 0 by C<format_header> and incremented every time C<format_item>
is called. Convenient for formats that require record numbers.
+=item processor_id
+
+Processor-specific value to be set by the processor during submit and
+passed to receive, useful for processors that require their own identifiers
+for download.
+
=back
=head1 METHODS
default => '',
);
+has processor_id => (
+ is => 'rw',
+ isa => 'Str',
+ default => '',
+);
+
has items => (
traits => ['Array'],
is => 'rw',