L<Date::Parse> for conversion functions. The empty string can be passed
to disable that time constraint completely.
-Available options are:
+Accepts the same options as L<balance_date_sql>:
=over 4
set to true to disregard unapplied credits, payments and refunds outside the specified time period - by default the time period restriction only applies to invoices (useful for reporting, probably a bad idea for event triggering)
+=item cutoff
+
+An absolute cutoff time. Payments, credits, and refunds I<applied> after this
+time will be ignored. Note that START_TIME and END_TIME only limit the date
+range for invoices and I<unapplied> payments, credits, and refunds.
+
=back
=cut