code: def write(self):
      s = b""
      s += write_correct_data("string", self.name)
      s += write_correct_data("string", self.v)
      s += write_correct_data("uint64_t", self.node_count)
      s += write_correct_data("uint64_t", self.edge_count)
      s += write_correct_data("uint32_t", self.partition_num)
      s += write_correct_data("uint32_t", len(self.node_meta))
      for name in self.node_meta:
          s += write_correct_data("string", name)
          s += write_correct_data(
              "featureType", self.node_meta[name][1]
          )
          s += write_correct_data("int32_t", self.node_meta[name][2])
          s += write_correct_data(
              "int64_t", self.node_feature_dim[name]
          )
      s += write_correct_data("uint32_t", len(self.edge_meta))
      for name in self.edge_meta:
          s += write_correct_data("string", name)
          s += write_correct_data(
              "featureType", self.edge_meta[name][1]
          )
          s += write_correct_data("int32_t", self.edge_meta[name][2])
          s += write_correct_data(
              "int64_t", self.edge_feature_dim[name]
          )
  
      s += write_correct_data("uint32_t", len(self.node_type_info))
      for tname in self.node_type_info:
          s += write_correct_data("string", tname)
          s += write_correct_data(
              "uint32_t", self.node_type_info[tname]
          )
  
      s += write_correct_data("uint32_t", len(self.edge_type_info))
      for tname in self.edge_type_info:
          s += write_correct_data("string", tname)
          s += write_correct_data(
              "uint32_t", self.edge_type_info[tname]
          )
  
      return s
  
file_path: euler/euler/tools/graph_meta.py
imports: import json
  from euler.tools.util import *
label_desc: Use image node_id 4 for calling the GraphMeta obj's underlying member method code with example usage: obj.write() and returns: s