code: def forward(self, hidden_states, buffer):
      hidden_states = cuda_ext.ext_rms_norm(
          hidden_states, self.weight, self.variance_epsilon
      )
      return hidden_states
  
imports: import sys
  import torch
  from torch import nn
  import torch.nn.functional
  from safetensors import safe_open
  import cuda_ext
  import json
  import math
  import gc
  from enum import Enum
label_desc: Use image node_id 2 for calling the ExLlamaRMSNorm obj's underlying member method code with example usage: obj.forward(hidden_states, buffer) and returns: hidden_states