code: def _degree(self, vertex_subset, direction=Direction.ALL):
      vertex_col, degree_col = graph_primtypes_wrapper._mg_degree(
          self, direction
      )
      df = cudf.DataFrame()
      df["vertex"] = vertex_col
      df["degree"] = degree_col
  
      if self.renumbered is True:
          df = self.renumber_map.unrenumber(df, "vertex")
  
      if vertex_subset is not None:
          df = df[df["vertex"].isin(vertex_subset)]
  
      return df
  
imports: import gc
  from typing import Union
  import warnings
  import cudf
  import cupy
  import dask
  import dask_cudf
  from dask import delayed
  from dask.distributed import wait, default_client
  import numpy
  from pylibcugraph import MGGraph, ResourceHandle, GraphProperties, get_two_hop_neighbors, select_random_vertices
  from cugraph.structure import graph_primtypes_wrapper
  from cugraph.structure.graph_primtypes_wrapper import Direction
  from cugraph.structure.number_map import NumberMap
  from cugraph.structure.symmetrize import symmetrize
  from cugraph.dask.common.part_utils import get_persisted_df_worker_map, persist_dask_df_equal_parts_per_worker
  from cugraph.dask.common.mg_utils import run_gc_on_dask_cluster
  from cugraph.dask import get_n_workers
  import cugraph.dask.comms.comms
label_desc: Use image node_id 15 for calling the simpleDistributedGraphImpl obj's underlying member method code with example usage: obj._degree(vertex_subset, direction) and returns: df