class_docstr: Gather And Expansion Layer with stride 1
class_docstr_tok: ["Gather","And","Expansion","Layer","with","stride","1"]
code: def __init__(self, in_dim, out_dim, expand):
      super().__init__()
  
      expand_dim = expand * in_dim
  
      self.conv = nn.Sequential(
          layers.ConvBNReLU(in_dim, in_dim, 3),
          layers.DepthwiseConvBN(in_dim, expand_dim, 3),
          layers.ConvBN(expand_dim, out_dim, 1),
      )
      self.relu = layers.Activation("relu")
  
imports: import os
  import paddle
  import paddle.nn
  import paddle.nn.functional
  from paddleseg import utils
  from paddleseg.cvlibs import manager, param_init
  from paddleseg.models import layers
label_desc: Use image node_id 1 to create a new GatherAndExpansionLayer1 object from inherited base classes: nn with example: obj = GatherAndExpansionLayer1(in_dim, out_dim, expand)