class_docstr: Transformer decoder of DINO.
docstr: Initialize decoder layers.
docstr_tok: ["Initialize","decoder","layers","."]
code: def _init_layers(self) -> None:
      """Initialize decoder layers."""
      super()._init_layers()
      self.ref_point_head = MLP(
          self.embed_dims * 2, self.embed_dims, self.embed_dims, 2
      )
      self.norm = nn.LayerNorm(self.embed_dims)
  
imports: import warnings
  from typing import Tuple, Union
  import torch
  from mmengine.model import BaseModule
  from torch import Tensor, nn
  from mmdet.structures import SampleList
  from mmdet.structures.bbox import bbox_xyxy_to_cxcywh
  from mmdet.utils import OptConfigType
  from .deformable_detr_layers import DeformableDetrTransformerDecoder
  from .utils import MLP, coordinate_to_encoding, inverse_sigmoid
label_desc: Use image node_id 1 for calling the DinoTransformerDecoder obj's underlying member method code with example usage: obj._init_layers() without return types