fn to_model(&self) -> anyhow::Result<Self::Model> {

        Ok(match self {

            ParserParam::AltRep { uri } => ModelParam::AltRep(AlternateRepresentationParam {

                uri: convert_string(uri),

            }),

            ParserParam::CommonName { name } => ModelParam::CommonName(CommonNameParam {

                name: name.to_string(),

            }),

            ParserParam::CalendarUserType { cu_type } => {

                ModelParam::CalendarUserType(CalendarUserTypeParam {

                    cu_type: cu_type.clone(),

                })

            ParserParam::DelegatedFrom { delegators } => {

                ModelParam::DelegatedFrom(DelegatedFromParam {

                    delegators: delegators.iter().map(|d| convert_string(d)).collect(),

                })

            ParserParam::DelegatedTo { delegates } => ModelParam::DelegatedTo(DelegatedToParam {

                delegates: delegates.iter().map(|d| convert_string(d)).collect(),

            }),

            ParserParam::DirectoryEntryReference { uri } => {

                ModelParam::DirectoryEntryReference(DirectoryEntryReferenceParam {

                    uri: String::from_utf8_lossy(uri).to_string(),

                })

            ParserParam::Encoding { encoding } => ModelParam::Encoding(EncodingParam {

                encoding: encoding.clone(),

            }),

                type_name,

                sub_type_name,

            } => ModelParam::FormatType(FormatTypeParam {

                type_name: type_name.to_string(),

                sub_type_name: sub_type_name.to_string(),

            }),

            ParserParam::FreeBusyTimeType { fb_type } => {

                ModelParam::FreeBusyTimeType(FreeBusyTimeTypeParam {

                    fb_type: fb_type.clone(),

                })

            ParserParam::Language { language } => ModelParam::Language(LanguageParam {

                language: language.clone(),

            }),

            ParserParam::Members { members } => ModelParam::Members(MembersParam {

                members: members.iter().map(|m| convert_string(m)).collect(),

            }),

            ParserParam::ParticipationStatus { status } => {

                ModelParam::ParticipationStatus(ParticipationStatusParam {

                    status: status.clone(),

                })

            ParserParam::Range { range } => ModelParam::Range(RangeParam {

                range: range.clone(),

            }),

            ParserParam::Related { related } => {

                ModelParam::TriggerRelationship(TriggerRelationshipParam {

                    trigger_relationship: related.clone(),

                })

            ParserParam::RelationshipType { relationship } => {

                ModelParam::RelationshipType(RelationshipTypeParam {

                    relationship: relationship.clone(),

                })

            ParserParam::Role { role } => ModelParam::Role(RoleParam { role: role.clone() }),

            ParserParam::Rsvp { rsvp } => ModelParam::Rsvp(RsvpParam { rsvp: *rsvp }),

            ParserParam::SentBy { address } => ModelParam::SentBy(SentByParam {

                address: convert_string(address),

            }),

            ParserParam::TimeZoneId { tz_id, unique } => ModelParam::TimeZoneId(TimeZoneIdParam {

                tz_id: tz_id.to_string(),

                unique: *unique,

            }),

            ParserParam::ValueType { value } => ModelParam::ValueType(ValueTypeParam {

                value: value.clone(),

            }),

            ParserParam::Other { name, value } => ModelParam::Other {

                name: convert_string(name),

                value: convert_string(value),

            },

    }