code: def pack_floats(
      self,
      float_tensor: V,
      offset_bit: int,
      pack_num: int,
      precision: int,
  ) -> FV:
      return self.coder.pack_floats(
          float_tensor.detach().tolist(),
          offset_bit,
          pack_num,
          precision,
      )
  
imports: from typing import List, Optional, Tuple
  import torch
  from fate_utils.ou import CiphertextVector, PlaintextVector
  from fate_utils.ou import Coder
  from fate_utils.ou import Evaluator
  from fate_utils.ou import PK
  from fate_utils.ou import SK
  from fate_utils.ou import keygen
  from .type import TensorEvaluator
label_desc: Use image node_id 2 for calling the Coder obj's underlying member method code with example usage: obj.pack_floats(float_tensor, offset_bit, pack_num, precision) and returns: self