code: def post_edges_arrow(self, arr=None, opts=""):
      if arr is None:
          arr = self.edges
      return self.post_arrow(arr, "edges", opts)
  
imports: from typing import List, Optional
  import io, pyarrow, requests, sys
  from graphistry.privacy import Mode, Privacy
  from .ArrowFileUploader import ArrowFileUploader
  from .util import setup_logger
label_desc: Use image node_id 45 for calling the ArrowUploader obj's underlying member method code with example usage: obj.post_edges_arrow(arr, opts) and returns: self