code: def _construct_graph(self) -> dict[tuple | str, tuple]:
      token_left = tokenize(
          # Include self.name to ensure that shuffle IDs are unique for individual
          # merge operations. Reusing shuffles between merges is dangerous because of
          # required coordination and complexity introduced through dynamic clusters.
          self.name,
          self.name_input_left,
          self.left_on,
          self.left_index,
      )
      token_right = tokenize(
          # Include self.name to ensure that shuffle IDs are unique for individual
          # merge operations. Reusing shuffles between merges is dangerous because of
          # required coordination and complexity introduced through dynamic clusters.
          self.name,
          self.name_input_right,
          self.right_on,
          self.right_index,
      )
      dsk: dict[tuple | str, tuple] = {}
      name_left = "hash-join-transfer-" + token_left
      name_right = "hash-join-transfer-" + token_right
      transfer_keys_left = list()
      transfer_keys_right = list()
      for i in range(self.n_partitions_left):
          transfer_keys_left.append((name_left, i))
          dsk[(name_left, i)] = (
              merge_transfer,
              (self.name_input_left, i),
              token_left,
              i,
              self.npartitions,
              self.meta_input_left,
              self.parts_out,
              self.disk,
          )
      for i in range(self.n_partitions_right):
          transfer_keys_right.append((name_right, i))
          dsk[(name_right, i)] = (
              merge_transfer,
              (self.name_input_right, i),
              token_right,
              i,
              self.npartitions,
              self.meta_input_right,
              self.parts_out,
              self.disk,
          )
  
      _barrier_key_left = barrier_key(ShuffleId(token_left))
      _barrier_key_right = barrier_key(ShuffleId(token_right))
      dsk[_barrier_key_left] = (
          shuffle_barrier,
          token_left,
          transfer_keys_left,
      )
      dsk[_barrier_key_right] = (
          shuffle_barrier,
          token_right,
          transfer_keys_right,
      )
  
      name = self.name
      for part_out in self.parts_out:
          dsk[(name, part_out)] = (
              merge_unpack,
              token_left,
              token_right,
              part_out,
              _barrier_key_left,
              _barrier_key_right,
              self.how,
              self.left_on,
              self.right_on,
              self.meta_output,
              self.suffixes,
              self.left_index,
              self.right_index,
          )
      return dsk
  
imports: from __future__ import annotations
  from collections.abc import Iterable, Sequence
  from typing import TYPE_CHECKING, Any
  import dask
  from dask.base import is_dask_collection, tokenize
  from dask.highlevelgraph import HighLevelGraph
  from dask.layers import Layer
  from distributed.shuffle._arrow import check_minimal_arrow_version
  from distributed.shuffle._core import ShuffleId, barrier_key, get_worker_plugin
  from distributed.shuffle._shuffle import shuffle_barrier, shuffle_transfer
label_desc: Use image node_id 13 for calling the HashJoinP2PLayer obj's underlying member method code with example usage: obj._construct_graph() and returns: dsk