code: def step(self, thumb=False):
          
          method = self._dll.JLINKARM_Step
          if thumb:
              method = self._dll.JLINKARM_StepComposite
  
          res = method()
          if res != 0:
              raise errors.JLinkException("Failed to step over instruction.")
  
          return None
docs: Executes a single step.
  
          Steps even if there is a breakpoint.
  
          Args:
            self (JLink): the ``JLink`` instance
            thumb (bool): boolean indicating if to step in thumb mode
  
          Returns:
            ``None``
  
          Raises:
            JLinkException: on error