code: def deprecated(context):
      
      env = context.get('env', None)
  
      get_info, set_info, unset_info = context.keys_of_type_exist(
          ('envGet', dict),
          ('envSet', dict),
          ('envUnset', list)
      )
  
      found_at_least_one = (get_info.key_in_context or set_info.key_in_context
                            or unset_info.key_in_context)
  
      if found_at_least_one:
          env = context['env'] = {}
      else:
          return
  
      if get_info.key_in_context and get_info.is_expected_type:
          env['get'] = context[get_info.key]
  
      if set_info.key_in_context and set_info.is_expected_type:
          env['set'] = context[set_info.key]
  
      if unset_info.key_in_context and unset_info.is_expected_type:
          env['unset'] = context[unset_info.key]
  
      logger.warning("envGet, envSet and envUnset are deprecated. They will "
                     "stop working upon the next major release. "
                     "Use the new context key env instead. It's a lot "
                     "better, promise! For the moment pypyr is creating the "
                     "new env key for you under the hood.")
docs: Handle deprecated context input.