+ inline static const std::string& FROM_SIZE_ID()
+ {
+ static const std::string MY_FROM_SIZE_ID("from_size");
+ return MY_FROM_SIZE_ID;
+ }
+
+ /// attribute name of an object to which the extrusion grows
+ inline static const std::string& TO_OBJECT_ID()
+ {
+ static const std::string MY_TO_OBJECT_ID("to_object");
+ return MY_TO_OBJECT_ID;
+ }
+
+ /// attribute name of extrusion offset
+ inline static const std::string& TO_OFFSET_ID()
+ {
+ static const std::string MY_TO_OFFSET_ID("to_offset");
+ return MY_TO_OFFSET_ID;
+ }
+
+ /// attribute name of tool object
+ inline static const std::string& FROM_OBJECT_ID()