code: def is_mergeable(self):
      return bool(self._pr_data["mergeable"])
  
imports: import configparser
  import os
  import pprint
  import re
  import subprocess
  import sys
  import requests
  import getpass
  from six.moves import input
  import six
label_desc: Use image node_id 4 for calling the PullRequest obj's underlying member method code with example usage: obj.is_mergeable() and returns: bool