code: def forward(self, x):
      x = self.fc1(x)
      x = self.act(x)
  
      x = self.fc2(x)
      x = self.drop(x)
      return x
  
imports: from collections.abc import Callable
  import numpy
  import paddle
  import paddle.nn
  from paddle.nn.initializer import TruncatedNormal, Constant, Normal
  from ppdet.core.workspace import register, serializable
label_desc: Use image node_id 2 for calling the Mlp obj's underlying member method code with example usage: obj.forward(x) and returns: x