code: def package_in_memory(cls, workflow_name, workflow_files):
          
          s = StringIO()
          p = cls(s, workflow_name, meta_data=[])
          p.add_bpmn_files_by_glob(workflow_files)
          p.create_package()
          return s.getvalue()
docs: Generates wf packages from workflow diagrams.
  
          Args:
              workflow_name: Name of wf
              workflow_files:  Diagram  file.
  
          Returns:
              Workflow package (file like) object