def serialize(self,writer: SerializationWriter) -> None:
        """
        Serializes information the current object
        param writer: Serialization writer to use to serialize this model
        Returns: None
        """
        if writer is None:
            raise TypeError("writer cannot be null.")
        writer.write_str_value("category1", self.category1)
        writer.write_str_value("category10", self.category10)
        writer.write_str_value("category11", self.category11)
        writer.write_str_value("category12", self.category12)
        writer.write_str_value("category13", self.category13)
        writer.write_str_value("category14", self.category14)
        writer.write_str_value("category15", self.category15)
        writer.write_str_value("category16", self.category16)
        writer.write_str_value("category17", self.category17)
        writer.write_str_value("category18", self.category18)
        writer.write_str_value("category19", self.category19)
        writer.write_str_value("category2", self.category2)
        writer.write_str_value("category20", self.category20)
        writer.write_str_value("category21", self.category21)
        writer.write_str_value("category22", self.category22)
        writer.write_str_value("category23", self.category23)
        writer.write_str_value("category24", self.category24)
        writer.write_str_value("category25", self.category25)
        writer.write_str_value("category3", self.category3)
        writer.write_str_value("category4", self.category4)
        writer.write_str_value("category5", self.category5)
        writer.write_str_value("category6", self.category6)
        writer.write_str_value("category7", self.category7)
        writer.write_str_value("category8", self.category8)
        writer.write_str_value("category9", self.category9)
        writer.write_str_value("@odata.type", self.odata_type)
        writer.write_additional_data_value(self.additional_data)

        Serializes information the current object
        param writer: Serialization writer to use to serialize this model
        Returns: None
        
msgraph/generated/models/planner_category_descriptions.py