file_path: xformers/xformers/triton/dropout.py
imports: from typing import Optional
  import torch
  import triton
  from torch.cuda.amp import custom_bwd, custom_fwd
  from xformers.components.activations import Activation, build_activation
  from xformers.triton.k_activations import get_triton_activation_index
  from xformers.triton.k_dropout import k_dropout_bw, k_dropout_fw
label_desc: Use image node_id 1 for calling the _dropout obj's underlying member method code with example usage: obj.forward(ctx, x, p, bias, activation, trainable_bias) and returns: y, triton,  triton