docs: def handle(self):
          """
          Executes the actual Stratum program.
          """
          self.output = PyStratumStyle(self.input, self.output)
  
          command = self.get_application().find('constants')
          ret = command.execute(self.input, self.output)
          if ret:
              return ret
  
          command = self.get_application().find('loader')
          ret = command.execute(self.input, self.output)
          if ret:
              return ret
  
          command = self.get_application().find('wrapper')
          ret = command.execute(self.input, self.output)
  
          self.output.writeln('')
  
          return ret