new_contents: import fileinput
  import argparse
  import logging
  
  BUILD_GRADLE = "platforms/android/build.gradle"
  # BUILD_GRADLE = "/tmp/build.gradle"
  LINE_BEFORE = "// PLUGIN GRADLE EXTENSIONS END"
  OUR_ADD_REMOVE_LINE = 'apply from: "cordova-plugin-crosswalk-webview/xwalk6-workaround.gradle"'
  
  def add_gradle_line():
      for line in fileinput.input(BUILD_GRADLE, inplace=True):
          line = line.strip("\n")
          print(line)
          if line == LINE_BEFORE:
              print(OUR_ADD_REMOVE_LINE)
  
  def remove_gradle_line():
      for line in fileinput.input(BUILD_GRADLE, inplace=True):
          line = line.strip("\n")
          if line == OUR_ADD_REMOVE_LINE:
              pass
          else:
              print(line)
  
  if __name__ == '__main__':
      parser = argparse.ArgumentParser()
      group = parser.add_mutually_exclusive_group(required=True)
  
      group.add_argument("-a", "--add", action="store_true",
          help="add the xwalk line to build.gradle")
      group.add_argument("-r", "--remove", action="store_true",
          help="remove the xwalk line from build.gradle")
  
      args = parser.parse_args()
  
      if args.add:
          add_gradle_line()
      if args.remove:
          remove_gradle_line()
  
subject: Add the grade_workaround used by the crosswalk plugin