def create_from_discriminator_value(parse_node: ParseNode) -> ThreatAssessmentRequest:
        """
        Creates a new instance of the appropriate class based on discriminator value
        param parse_node: The parse node to use to read the discriminator value and create the object
        Returns: ThreatAssessmentRequest
        """
        if parse_node is None:
            raise TypeError("parse_node cannot be null.")
        try:
            child_node = parse_node.get_child_node("@odata.type")
            mapping_value = child_node.get_str_value() if child_node else None
        except AttributeError:
            mapping_value = None
        if mapping_value and mapping_value.casefold() == "#microsoft.graph.emailFileAssessmentRequest".casefold():
            from .email_file_assessment_request import EmailFileAssessmentRequest

            return EmailFileAssessmentRequest()
        if mapping_value and mapping_value.casefold() == "#microsoft.graph.fileAssessmentRequest".casefold():
            from .file_assessment_request import FileAssessmentRequest

            return FileAssessmentRequest()
        if mapping_value and mapping_value.casefold() == "#microsoft.graph.mailAssessmentRequest".casefold():
            from .mail_assessment_request import MailAssessmentRequest

            return MailAssessmentRequest()
        if mapping_value and mapping_value.casefold() == "#microsoft.graph.urlAssessmentRequest".casefold():
            from .url_assessment_request import UrlAssessmentRequest

            return UrlAssessmentRequest()
        return ThreatAssessmentRequest()

        Creates a new instance of the appropriate class based on discriminator value
        param parse_node: The parse node to use to read the discriminator value and create the object
        Returns: ThreatAssessmentRequest
        
msgraph/generated/models/threat_assessment_request.py