docstr: Create database pointer for all related domains.
docstr_tok: ["Create","database","pointer","for","all","related","domains","."]
code: def addDBPointer(self, domain, match_num, return_num=False):
      """Create database pointer for all related domains."""
      # if turn_domains is None:
      #     turn_domains = db_domains
      if domain in db_domains:
          vector = self.oneHotVector(domain, match_num)
      else:
          vector = [0, 0, 0, 0]
      return vector
  
file_path: TextBox/textbox/evaluator/utils/multiwoz/db_ops.py
imports: import json, random, sqlite3
  from .ontology import all_domains, db_domains
label_desc: Use image node_id 4 for calling the MultiWozDB obj's underlying member method code with example usage: obj.addDBPointer(domain, match_num, return_num) and returns: vector