code: def forward(self, x):
      offset = self.conv_offset(x)
      return deform_conv(
          x,
          offset,
          self.weight,
          self.stride,
          self.padding,
          self.dilation,
          self.groups,
          self.deformable_groups,
      )
  
imports: import math
  import torch
  import torch.nn
  from torch.nn.modules.utils import _pair
  from ..functions.deform_conv import deform_conv, modulated_deform_conv
label_desc: Use image node_id 3 for calling the DeformConvPack obj's underlying member method code with example usage: obj.forward(x) and returns: deform_conv