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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def process(self):
 """Entry point of SelectableSelector"""

        if WINDOWS:
            select_inputs = []
            for i in self.inputs:
                if not isinstance(i, SelectableObject):
                    warning("Unknown ignored object type: %s", type(i))
                elif i.__selectable_force_select__:
                    # Then use select.select
                    select_inputs.append(i)
                elif not self.remain and i.check_recv():
                    self.results.append(i)
                else:
                    i.wait_return(self._exit_door)
            if select_inputs:
                # Use default select function
                self.results.extend(select(select_inputs, [], [], self.remain)[0])  # noqa: E501
            if not self.remain:
                return self.results

            threading.Thread(target=self._timeout_thread, args=(self.remain,)).start()  # noqa: E501
            if not self._ended:
                self.available_lock.acquire()
            return self.results
        else:
            r, _, _ = select(self.inputs, [], [], self.remain)
            return r