Support importing elements with no representations

src/blenderbim/blenderbim/bim/import_ifc.py

@@ -346,6 +346,8 @@ class IfcImporter:
         self.profile_code("Create native products")
         self.create_products()
         self.profile_code("Create products")
+        self.create_empty_products()
+        self.profile_code("Create empty products")
         self.create_type_products()
         self.profile_code("Create type products")
         self.create_annotation()
@@ -715,6 +717,11 @@ class IfcImporter:
                 break
         print("Done creating geometry")
 
+    def create_empty_products(self):
+        for element in self.file.by_type("IfcElement"):
+            if not element.Representation:
+                self.create_product(element)
+
     def create_annotation(self):
         self.create_curve_products(self.file.by_type("IfcAnnotation"))