text: from typing import Callable
  from tensorflow.keras.layers import *
  from tensorflow.keras.optimizers.schedules import *
  import segmentation_models as sm
  from custom_objects.custom_metrics import CustomMeanIOU
  from tensorflow.keras.models import Model
  import numpy as np
  import tensorflow as tf
  from config import config as cfg
  
  
  SM_FRAMEWORK=tf.keras
  
  def unet_backbone_resnet34_bce_jaccard_loss():
      unet_model = sm.Unet('resnet34', classes=cfg['classes'], activation='softmax',input_shape=cfg['input_shape'], encoder_weights=None)
  
      unet_model.compile(
          'Adam',
          loss=sm.losses.bce_jaccard_loss,
          metrics=[CustomMeanIOU(cfg['classes'], dtype=np.float32),sm.metrics.f1_score],
      )
      return unet_model