code: def DynamicPositionBias(dim):
      return nn.Sequential(
          nn.Linear(2, dim),
          nn.LayerNorm(dim),
          nn.ReLU(),
          nn.Linear(dim, dim),
          nn.LayerNorm(dim),
          nn.ReLU(),
          nn.Linear(dim, dim),
          nn.LayerNorm(dim),
          nn.ReLU(),
          nn.Linear(dim, 1),
          Rearrange("... () -> ..."),
      )
  
imports: import torch
  from torch import nn, einsum
  from einops import rearrange
  from einops.layers.torch import Rearrange, Reduce
  import torch.nn.functional
label_desc: Use image node_id 2 for calling a global function with example usage: DynamicPositionBias(dim) and returns: nn