code: def forward(self, x):
      x = self.c_qkv(x)
      x = self.attention(x)
      x = self.c_proj(x)
      return x
  
imports: import math
  import torch
  import torch.nn
label_desc: Use image node_id 2 for calling the MultiheadAttention obj's underlying member method code with example usage: obj.forward(x) and returns: x