class_docstr: Encapsulation of a request to Demisto to create an incident.
class_docstr_tok: ["Encapsulation","of","a","request","to","Demisto","to","create","an","incident","."]
code: def create_investigation(self):
      return self._create_investigation
  
imports: from collections import OrderedDict
  from streamalert.alert_processor.helpers import compose_alert
  from streamalert.alert_processor.outputs.output_base import OutputDispatcher, OutputProperty, StreamAlertOutput, OutputRequestFailure
  from streamalert.shared.logger import get_logger
label_desc: Use image node_id 11 for calling the DemistoCreateIncidentRequest obj's underlying member method code with example usage: obj.create_investigation() and returns: self