Revert "remove unused method"

This reverts commit a412e2d.

Author: robertbasic

pugdebug/debugger.py

@@ -306,6 +306,12 @@ def list_breakpoints(self):
     def handle_listed_breakpoints(self, breakpoints):
         self.breakpoints_listed_signal.emit(breakpoints)
 
+    def get_index_file(self):
+        if 'fileuri' in self.init_message:
+            return self.init_message['fileuri']
+        else:
+            return None
+
     def evaluate_expression(self, index, expression):
         """Evaluates a single expression"""
         self.current_connection.evaluate_expression(index, expression)