关于snapshot是否支持多屏的问题

**描述问题**
我们当前在一个比较特殊的安卓设备中尝试使用Airtest的API，该设备比较特殊，Android系统是多屏输出（有显示屏1和显示屏2）。我们在连接设备的时候选择的cap_method是adbcap，当我们调用API的snapshot方法时，该方法只能截取显示屏1的信息，因此为了适配我们自己的测试场景（能让用户自己选择截取显示屏1或者2），我们基于Airtest的API封装了自己的API，并且改写了snapshot方法：
```python
def _snap_shot(dev, filename=None, ensure_orientation=True, screen_idx=0):
"""default not write into file."""
if dev.cap_method == CAP_METHOD.MINICAP_STREAM:
dev.rotation_watcher.get_ready()
screen = dev.minicap.get_frame_from_stream()
elif dev.cap_method == CAP_METHOD.MINICAP:
screen = dev.minicap.get_frame()
elif dev.cap_method == CAP_METHOD.JAVACAP:
screen = dev.javacap.get_frame_from_stream()
else:
# screen = dev.adb.snapshot()
screen = _adb_snap_shot(dev.adb, screen_idx)
# output cv2 object
try:
screen = aircv.utils.string_2_img(screen)
except Exception:
# may be black/locked screen or other reason, print exc for debugging
import traceback
traceback.print_exc()
return None

# ensure the orientation is right
if ensure_orientation and dev.display_info["orientation"]:
# minicap screenshots are different for various sdk_version
if dev.cap_method in (CAP_METHOD.MINICAP, CAP_METHOD.MINICAP_STREAM) and dev.sdk_version <= 16:
h, w = screen.shape[:2] # Hight is in the front for cvshape!!!!
if w < h: # For devices with sdk<=16, will rotate if the picture is upright when screen is landscape
screen = aircv.rotate(screen, dev.display_info["orientation"] * 90, clockwise=False)
# No extra rotation if sdk>=25(Android7.1 and above) for adb snapshot
elif dev.cap_method == CAP_METHOD.ADBCAP and dev.sdk_version <= SDK_VERISON_NEW:
screen = aircv.rotate(screen, dev.display_info["orientation"] * 90, clockwise=False)
if filename:
aircv.imwrite(filename, screen)
return screen

def _adb_snap_shot(adb, screen_idx=0):
cmd_screencap = "shell screencap -p -d " + str(screen_idx)
print("cmd_screencap: {0}".format(cmd_screencap))
raw = adb.cmd(cmd_screencap, ensure_unicode=False)
return raw.replace(adb.line_breaker, b"\n")
```

请问，在Airtest后续的版本中，有计划在snapshot中支持选择不同屏幕么？除了screencap，还有minicap