<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def fetchExternalUpdates(self):

 """
 !Experimental!
 Calls out to the client code requesting seed values to use in the UI
 !Experimental!
 """

        seeds = seeder.fetchDynamicProperties(
            self.buildSpec['target'],
            self.buildSpec['encoding']
        )
        for config in self.configs:
            config.seedUI(seeds)