code: def GetFsType(self):
      
      if self._tsk_fs_type is None:
        self._tsk_fs_type = pytsk3.TSK_FS_TYPE_UNSUPP
        if (not self._tsk_file_system or
            not hasattr(self._tsk_file_system, 'info')):
          return self._tsk_fs_type
  
        self._tsk_fs_type = getattr(
            self._tsk_file_system.info, 'ftype', pytsk3.TSK_FS_TYPE_UNSUPP)
  
      return self._tsk_fs_type
docs: Retrieves the file system type.
  
      Returns:
        pytsk3.TSK_FS_TYPE_ENUM: file system type.