code: def freeze_patch_emb(self):
      self.patch_embed1.requires_grad = False
  
imports: import math
  from functools import partial
  import paddle
  import paddle.nn
  import paddle.nn.functional
  import paddle.nn.initializer
  from paddleseg.cvlibs import manager
  from paddleseg.utils import utils
  from paddleseg.models.backbones.transformer_utils import *
label_desc: Use image node_id 5 for calling the MixVisionTransformer obj's underlying member method code with example usage: obj.freeze_patch_emb() without return types