code: def preprocess_feature_idx(self, gmeta):
      expend_list(self.dense, gmeta.node_feature_maxnum["dense"])
      expend_list(self.sparse, gmeta.node_feature_maxnum["sparse"])
      expend_list(self.binary, gmeta.node_feature_maxnum["binary"])
  
file_path: euler/euler/tools/node.py
imports: import struct
  from euler.tools.util import *
label_desc: Use image node_id 2 for calling the Node obj's underlying member method code with example usage: obj.preprocess_feature_idx(gmeta) without return types