class_docstr: Locking mechanism that issues tickets managing access to conversation IDs.
  
  Tickets are issued in the order in which they are requested. A detailed
  explanation of the ticket lock algorithm can be found at
  http://pages.cs.wisc.edu/~remzi/OSTEP/threads-locks.pdf#page=13
docstr: Create `TicketLock` from dictionary.
docstr_tok: ["Create","`","TicketLock","`","from","dictionary","."]
code: def from_dict(cls, data: Dict[Text, Any]) -> "TicketLock":
      """Create `TicketLock` from dictionary."""
      tickets = [
          Ticket.from_dict(json.loads(d))
          for d in data.get("tickets", [])
      ]
      return cls(data.get("conversation_id"), deque(tickets))
  
imports: import json
  import logging
  from collections import deque
  import time
  from typing import Text, Optional, Union, Deque, Dict, Any
label_desc: Use image node_id 2 for calling the TicketLock obj's underlying member method code with example usage: obj.from_dict(cls, data) and returns: cls