code: def get_all(store, rank: int, prefix: str, size: int):
      r"""
      Given a store and a prefix, the method goes through the array of keys
      of the following format: ``{prefix}{idx}``, where idx is in a range
      from 0 to size, and tries to retrieve the data.
  
      The Rank0 process waits at the end to make sure all other processes
      finished the procedure before exiting.
  
      Usage
  
      ::
  
       values = get_all(store, 'torchelastic/data', 3)
       value1 = values[0] # retrieves the data for key torchelastic/data0
       value2 = values[1] # retrieves the data for key torchelastic/data1
       value3 = values[2] # retrieves the data for key torchelastic/data2
  
      """
      data_arr = []
      for idx in range(size):
          data = store.get(f"{prefix}{idx}")
          data_arr.append(data)
      store.set(f"{prefix}{rank}.FIN", b"FIN")
      if rank == 0:
          # Rank0 runs the TCPStore daemon, as a result it needs to exit last.
          # Otherwise, the barrier may timeout if rank0 process finished the work
          # before other processes finished `get_all` method
          for node_rank in range(size):
              store.get(f"{prefix}{node_rank}.FIN")
  
      return data_arr
  
imports: from datetime import timedelta
  from typing import List
label_desc: Use image node_id 1 for calling a global function with example usage: get_all(store, rank, prefix, size) and returns: data_arr