code: def to_non_native_fp32(self: Learner):
      return self.remove_cbs([ModelToHalf, NonNativeMixedPrecision])
  
imports: from __future__ import annotations
  from ..basics import *
  from .progress import *
  from torch.cuda.amp import GradScaler, autocast
  from torch.cuda.amp.grad_scaler import OptState
  from ..fp16_utils import convert_network, model_grads_to_master_grads, master_params_to_model_params
  from torch.nn.utils import parameters_to_vector
label_desc: Use image node_id 12 for calling a global function with example usage: to_non_native_fp32() and returns: self