code: def _init_contrast_encoder(self):
      bias_en = bias_init_with_prob(0.01)
      for en_ in self.contrast_encoder:
          constant_(en_.weight)
          constant_(en_.bias, bias_en)
  
file_path: PaddleDetection/ppdet/modeling/heads/ppyoloe_contrast_head.py
imports: import paddle
  import paddle.nn
  import paddle.nn.functional
  from ppdet.core.workspace import register
  from ..initializer import bias_init_with_prob, constant_
  from ..assigners.utils import generate_anchors_for_grid_cell
  from ppdet.modeling.heads.ppyoloe_head import PPYOLOEHead
label_desc: Use image node_id 2 for calling the PPYOLOEContrastHead obj's underlying member method code with example usage: obj._init_contrast_encoder() without return types