code: def create_new_diagram_graph(self, diagram_name=""):
          
          self.__init__()
          diagram_id = BpmnDiagramGraph.id_prefix + str(uuid.uuid4())
  
          self.diagram_attributes[consts.Consts.id] = diagram_id
          self.diagram_attributes[consts.Consts.name] = diagram_name
docs: Initializes a new BPMN diagram and sets up a basic diagram attributes.
          Accepts a user-defined values for following attributes:
          (Diagram element)
  
          - name - default value empty string.
  
          :param diagram_name: string type. Represents a user-defined value of 'BPMNDiagram' element
              attribute 'name'. Default value - empty string.