class_docstr: Basic Neck of ACAR-Net
  
  Args:
      - aug_threshold (`float`):
          threshold on preserved ratio of bboxes after cropping augmentation.
      - num_classes (`int`):
          Number of classes.
      - multi_class (`bool`):
          Whether to use multiple classes.
code: def __init__(
      self, aug_threshold=0.0, num_classes=60, multi_class=True
  ):
      super().__init__()
  
      # threshold on preserved ratio of bboxes after cropping augmentation
      self.aug_threshold = aug_threshold
  
      self.num_classes = num_classes
      self.multi_class = multi_class
  
imports: import torch
  from torch import nn
  from towhee.models.acar_net.utils import get_bbox_after_aug
label_desc: Use image node_id 1 to create a new BasicNeck object from inherited base classes: nn with example: obj = BasicNeck(aug_threshold, num_classes, multi_class)