code: def forward(self, x):
      out = self.trans_encoder(x)
      return out
  
imports: import paddle
  import paddle.nn
  import paddle.nn.functional
  from paddle.nn import ReLU, Swish, GELU
  import math
  from ppdet.core.workspace import register
  from ..shape_spec import ShapeSpec
label_desc: Use image node_id 2 for calling the TransEncoder obj's underlying member method code with example usage: obj.forward(x) and returns: out