class_docstr: Implement of GATv2
class_docstr_tok: ["Implement","of","GATv2"]
code: def forward(self, graph, feature):
      for m in self.gats:
          feature = m(graph, feature)
      return feature
  
file_path: PGL/examples/gatv2/train.py
imports: import tqdm
  import pgl
  import paddle
  import paddle.nn
  from pgl.utils.logger import log
  import numpy
  import time
  import argparse
  from paddle.optimizer import Adam
label_desc: Use image node_id 2 for calling the GATv2 obj's underlying member method code with example usage: obj.forward(graph, feature) and returns: feature