Add a GetIM() method to Colour, Point, Size, Rect and other ‘value’ types.

GetIM() returns a replicant of the original object that is immutable, so it can be used as a dictionary key, or etc., but still gives access to the properties by name, which using the Get() method to get a tuple of the values does not do.

etg/richtextbuffer.py

@@ -171,6 +171,8 @@ def run():
         pyArgsString="() -> (start, end)",
         briefDoc="Return the start and end properties as a tuple.")
 
+    tools.addGetIMMethodTemplate(module, c, ['Start', 'End'])
+
     # Add sequence protocol methods and other goodies
     c.addPyMethod('__str__', '(self)',             'return str(self.Get())')
     c.addPyMethod('__repr__', '(self)',            'return "RichTextRange"+str(self.Get())')