code: def sample_publisher_5(_, publication):
      new_publication = publication.copy()
      new_publication["test4"] = True
      return new_publication
  
imports: from mock import patch
  from nose.tools import assert_true, assert_equal, assert_false
  from streamalert.alert_processor.helpers import _assemble_alert_publisher_for_output
  from streamalert.shared.publisher import AlertPublisherRepository, AlertPublisher, CompositePublisher, DefaultPublisher, Register, WrappedFunctionPublisher
  from tests.unit.streamalert.alert_processor.helpers import get_alert
label_desc: Use image node_id 1 for calling a global function with example usage: sample_publisher_5(_, publication) and returns: new_publication