old_contents: """
  This module contains the logic which returns the set of
  schedulers to use for the build master.
  """
  
  def get_schedulers():
      return []
  
new_contents: """
  This module contains the logic which returns the set of
  schedulers to use for the build master.
  """
  
  from buildbot.changes.filter import ChangeFilter
  from buildbot.schedulers.basic import SingleBranchScheduler
  
  def get_schedulers():
      full = SingleBranchScheduler(name="full",
                                   change_filter=ChangeFilter(branch="master"),
                                   treeStableTimer=60,
                                   builderNames=["vagrant-master"])
      return [full]
  
subject: Add a scheduler for the master branch to run