  
  _FS_BACKEND = _Backend().backend
  
  
  def get_backend():
      """ Get the backend that Faceswap is currently configured to use.
  
      Returns
      -------
      str
 
</s> remove _FS_BACKEND = _Backend().backend
 </s> add _FS_BACKEND: ValidBackends = _Backend().backend </s> remove     def _configure_backend(self):
 </s> add     def _configure_backend(self) -> ValidBackends: </s> remove         return fs_backend.lower()
 </s> add         return fs_backend </s> remove def get_tf_version():
 </s> add def get_tf_version() -> float: </s> remove     _FS_BACKEND = backend.lower()
 </s> add     backend = cast(ValidBackends, backend.lower())
    _FS_BACKEND = backend
def get_backend() -> ValidBackends:
  
  _FS_BACKEND = _Backend().backend
  
  
def get_backend() -> ValidBackends:
      """ Get the backend that Faceswap is currently configured to use.
  
      Returns
      -------
      str
keep keep keep keep replace keep keep keep keep keep
 lib.Utils - add DPI detector 
lib/utils.py