docstr: Get the name string of backbones which will be used to initialize flexible unet.
docstr_tok: ["Get","the","name","string","of","backbones","which","will","be","used","to","initialize","flexible","unet","."]
code: def get_encoder_names(cls):
      """
      Get the name string of backbones which will be used to initialize flexible unet.
      """
      return cls.backbone_names
  
imports: from __future__ import annotations
  import unittest
  import torch
  from parameterized import parameterized
  from monai.networks import eval_mode
  from monai.networks.blocks.encoder import BaseEncoder
  from monai.networks.nets import FLEXUNET_BACKBONE, EfficientNetBNFeatures, FlexibleUNet, FlexUNetEncoderRegister, ResNet, ResNetBlock, ResNetBottleneck
  from monai.utils import optional_import
  from tests.utils import skip_if_downloading_fails, skip_if_quick
label_desc: Use image node_id 6 for calling the ResNetEncoder obj's underlying member method code with example usage: obj.get_encoder_names(cls) and returns: cls