<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def input_tray_status(self,
 filter_supported: bool = True) -> Dict[int, Any]:
 """Return the state of all input trays."""

        tray_status = {}
        for i in range(1, 5):
            try:
                tray_stat = self.data.get('{}{}'.format(SyncThru.TRAY, i), {})
                if filter_supported and tray_stat.get('opt', 0) == 0:
                    continue
                else:
                    tray_status[i] = tray_stat
            except (KeyError, AttributeError):
                tray_status[i] = {}
        return tray_status