code: def forward(self, x):
      return self.conv(x)
  
imports: import paddle
  import paddle.nn
  from paddleseg.cvlibs import manager
  from paddleseg.models import layers
  from paddleseg import utils
  import numpy
label_desc: Use image node_id 2 for calling the ConvBlock obj's underlying member method code with example usage: obj.forward(x) and returns: self