docs: def disable_tracing(self):
          """ Disable tracing if it is disabled and debugged program is running, 
          else do nothing.
  
          :return: False if tracing has been disabled, True else.
          """
          _logger.x_debug("disable_tracing()")
          #self.dump_tracing_state("before disable_tracing()")
          if self.tracing_enabled and self.execution_started:
              threading.settrace(None)  # don't trace threads to come
              iksettrace3._set_trace_off()
              self.tracing_enabled = False
          #self.dump_tracing_state("after disable_tracing()")
          return self.tracing_enabled