Index: lldb/examples/python/scripted_process/scripted_process.py
===================================================================
--- lldb/examples/python/scripted_process/scripted_process.py
+++ lldb/examples/python/scripted_process/scripted_process.py
@@ -76,6 +76,15 @@
         """
         pass
 
+    def get_most_relevant_thread_index(self):
+        """ Get the index of the most releveant scripted process thread.
+
+        Returns:
+            Int: The most relevant thread index according to the user.
+                 (default: 0)
+        """
+        return 0
+
     @abstractmethod
     def get_registers_for_thread(self, tid):
         """ Get the register context dictionary for a certain thread of
Index: lldb/test/API/functionalities/scripted_process/stack_core_scripted_process.py
===================================================================
--- lldb/test/API/functionalities/scripted_process/stack_core_scripted_process.py
+++ lldb/test/API/functionalities/scripted_process/stack_core_scripted_process.py
@@ -57,6 +57,9 @@
 
         return data
 
+    def get_most_relevant_thread_index(self):
+        return 3
+
     def get_loaded_images(self):
         # TODO: Iterate over corefile_target modules and build a data structure
         # from it.