code: def edge_drop(graph_wrapper, dropout_rate, keep_self_loop=True):
      if dropout_rate < 1e-5:
          return graph_wrapper
      else:
          return pgl.graph_wrapper.DropEdgeWrapper(
              graph_wrapper, dropout_rate, keep_self_loop
          )
  
imports: import sys
  import time
  import copy
  import warnings
  import numpy
  import pgl
  from pgl import graph_kernel
  from pgl.utils.logger import log
label_desc: Use image node_id 15 for calling a global function with example usage: edge_drop(graph_wrapper, dropout_rate, keep__loop) and returns: graph_wrapper, pgl