# Built-in features
from part import Part as addPart
-from sketcher.sketch import Sketch as addSketch
+from sketcher.sketch import addSketch
from extrusion import Extrusion as addExtrusion
from boolean import Addition as addAddition
from boolean import Subtraction as addSubtraction
from boolean import Intersection as addIntersection
+
+# Custom exceptions
+
+from errors import WrongNumberOfArguments
\ No newline at end of file