code: def from_bytes_list(cls, function_descriptor_list):
          
          assert isinstance(function_descriptor_list, list)
          if len(function_descriptor_list) == 0:
              # This is a function descriptor of driver task.
              return FunctionDescriptor.for_driver_task()
          elif (len(function_descriptor_list) == 3
                or len(function_descriptor_list) == 4):
              module_name = ensure_str(function_descriptor_list[0])
              class_name = ensure_str(function_descriptor_list[1])
              function_name = ensure_str(function_descriptor_list[2])
              if len(function_descriptor_list) == 4:
                  return cls(module_name, function_name, class_name,
                             function_descriptor_list[3])
              else:
                  return cls(module_name, function_name, class_name)
          else:
              raise Exception(
                  "Invalid input for FunctionDescriptor.from_bytes_list")
docs: Create a FunctionDescriptor instance from list of bytes.
  
          This function is used to create the function descriptor from
          backend data.
  
          Args:
              cls: Current class which is required argument for classmethod.
              function_descriptor_list: list of bytes to represent the
                  function descriptor.
  
          Returns:
              The FunctionDescriptor instance created from the bytes list.