update

lib/Slic3r/Flow.pm

@@ -0,0 +1,13 @@
+package Slic3r::Flow;
+use strict;
+use warnings;
+
+use parent qw(Exporter);
+
+our @EXPORT_OK = qw(FLOW_ROLE_EXTERNAL_PERIMETER FLOW_ROLE_PERIMETER FLOW_ROLE_INFILL
+    FLOW_ROLE_SOLID_INFILL
+    FLOW_ROLE_TOP_SOLID_INFILL FLOW_ROLE_SUPPORT_MATERIAL 
+    FLOW_ROLE_SUPPORT_MATERIAL_INTERFACE);
+our %EXPORT_TAGS = (roles => \@EXPORT_OK);
+
+1;