--- a/controls/CustomTree.py	Mon Aug 14 22:30:41 2017 +0300
+++ b/controls/CustomTree.py	Mon Aug 14 23:27:15 2017 +0300
@@ -30,6 +30,7 @@
 # Customize CustomTreeItem for adding icon on item left
 CT.GenericTreeItem._ExtraImage = None
 
+
 def SetExtraImage(self, image):
     self._type = (1 if image is not None else 0)
     self._ExtraImage = image
@@ -37,12 +38,15 @@
 CT.GenericTreeItem.SetExtraImage = SetExtraImage
 
 _DefaultGetCurrentCheckedImage = CT.GenericTreeItem.GetCurrentCheckedImage
+
+
 def GetCurrentCheckedImage(self):
     if self._ExtraImage is not None:
         return self._ExtraImage
     return _DefaultGetCurrentCheckedImage(self)
 CT.GenericTreeItem.GetCurrentCheckedImage = GetCurrentCheckedImage
 
+
 class CustomTree(CT.CustomTreeCtrl):
 
     def __init__(self, *args, **kwargs):