+#false laziness w/select-did.html
+#XXX make sure this comes through on errors too
+my $svcpart = $opt{'svcpart'}
+ || $opt{'object'}->svcpart
+ || $opt{'object'}->cust_svc->svcpart;
+
+my $part_svc = qsearchs('part_svc', { 'svcpart'=>$svcpart } );
+die "unknown svcpart $svcpart" unless $part_svc;
+
+my @exports = $part_svc->part_export_did;
+if ( scalar(@exports) > 1 ) {
+ die "more than one DID-providing export attached to svcpart $svcpart";
+}
+
+my $use_selector = scalar(@exports) ? 1 : 0;
+