code: def with_pos_embed(self, tensor, pos):
      return tensor if pos is None else tensor + pos
  
imports: import paddle
  import paddle.nn
  import paddle.nn.functional
  from paddleseg.cvlibs import param_init
  from paddlepanseg.models.param_init import c2_xavier_fill, THLinearInitMixin, th_linear_fill, th_multihead_fill
  from .common import Conv2D, PositionEmbeddingSine
label_desc: Use image node_id 3 for calling the FFNLayer obj's underlying member method code with example usage: obj.with_pos_embed(tensor, pos) and returns: unknown