-from bt2.component import _SourceComponentClass
-from bt2.component import _FilterComponentClass
-from bt2.component import _SinkComponentClass
-from bt2.component import _SourceComponent
-from bt2.component import _FilterComponent
-from bt2.component import _SinkComponent
+from bt2.component import _SourceComponentClassConst
+from bt2.component import _FilterComponentClassConst
+from bt2.component import _SinkComponentClassConst
+from bt2.component import _SourceComponentConst
+from bt2.component import _FilterComponentConst
+from bt2.component import _SinkComponentConst