@staticmethod
    def create_from_discriminator_value(parse_node: Optional[ParseNode] = None) -> Attachment:
        """
        Creates a new instance of the appropriate class based on discriminator value
        Args:
            parseNode: The parse node to use to read the discriminator value and create the object
        Returns: Attachment
        """
        if parse_node is None:
            raise Exception("parse_node cannot be undefined")
        return Attachment()

@staticmethod
    def create_from_discriminator_value(parse_node: Optional[ParseNode] = None) -> Attachment:
        """
        Creates a new instance of the appropriate class based on discriminator value
        Args:
            parseNode: The parse node to use to read the discriminator value and create the object
        Returns: Attachment
        """
        if parse_node is None:
            raise Exception("parse_node cannot be undefined")
        mapping_value_node = parse_node.get_child_node("@odata.type")
        if mapping_value_node:
            mapping_value = mapping_value_node.get_str_value()
            if mapping_value == "#microsoft.graph.fileAttachment":
                return file_attachment.FileAttachment()
            if mapping_value == "#microsoft.graph.itemAttachment":
                return item_attachment.ItemAttachment()
            if mapping_value == "#microsoft.graph.referenceAttachment":
                return reference_attachment.ReferenceAttachment()
        return Attachment()