code: def with_pos_embed(tensor, pos_embed):
      return tensor if pos_embed is None else tensor + pos_embed
  
imports: import math
  import copy
  import numpy
  import paddle
  import paddle.nn
  import paddle.nn.functional
  from ppdet.core.workspace import register, serializable
  from ppdet.modeling.layers import DropBlock, MultiHeadAttention
  from ppdet.modeling.ops import get_act_fn
  from ..backbones.cspresnet import ConvBNLayer, BasicBlock
  from ..shape_spec import ShapeSpec
  from ..initializer import linear_init_
label_desc: Use image node_id 3 for calling the TransformerEncoderLayer obj's underlying member method code with example usage: obj.with_pos_embed(tensor, pos_embed) and returns: unknown