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

        match self {

            crate::parser::types::CalendarComponent::Event { properties, alarms } => {

                let mut component = EventComponent::new();

                component.properties.reserve(properties.len());

                for property in properties {

                    component.properties.push(property.to_model()?);

                component.alarms.reserve(alarms.len());

                for alarm in alarms {

                    component.alarms.push(alarm.to_model()?);

                Ok(crate::model::component::CalendarComponent::Event(component))

            crate::parser::types::CalendarComponent::ToDo { properties, alarms } => {

                let mut component = ToDoComponent::new();

                component.properties.reserve(properties.len());

                for property in properties {

                    component.properties.push(property.to_model()?);

                component.alarms.reserve(alarms.len());

                for alarm in alarms {

                    component.alarms.push(alarm.to_model()?);

                Ok(crate::model::component::CalendarComponent::ToDo(component))

            crate::parser::types::CalendarComponent::Journal { properties } => {

                let mut journal = JournalComponent::new();

                journal.properties.reserve(properties.len());

                for property in properties {

                    journal.properties.push(property.to_model()?);

                Ok(crate::model::component::CalendarComponent::Journal(journal))

            crate::parser::types::CalendarComponent::FreeBusy { properties } => {

                let mut free_busy = FreeBusyComponent::new();

                free_busy.properties.reserve(properties.len());

                for property in properties {

                    free_busy.properties.push(property.to_model()?);

                Ok(crate::model::component::CalendarComponent::FreeBusy(

                    free_busy,

                ))

            crate::parser::types::CalendarComponent::Standard { properties } => {

                let mut standard = StandardComponent::new();

                standard.properties.reserve(properties.len());

                for property in properties {

                    standard.properties.push(property.to_model()?);

                Ok(crate::model::component::CalendarComponent::Standard(

                    standard,

                ))

            crate::parser::types::CalendarComponent::Daylight { properties } => {

                let mut daylight = DaylightComponent::new();

                daylight.properties.reserve(properties.len());

                for property in properties {

                    daylight.properties.push(property.to_model()?);

                Ok(crate::model::component::CalendarComponent::Daylight(

                    daylight,

                ))

                properties,

                components,

            } => {

                let mut timezone = TimeZoneComponent::new();

                timezone.properties.reserve(properties.len());

                for property in properties {

                    timezone.properties.push(property.to_model()?);

                timezone.components.reserve(components.len());

                for component in components {

                    timezone.components.push(component.to_model()?);

                Ok(crate::model::component::CalendarComponent::TimeZone(

                    timezone,

                ))

            crate::parser::types::CalendarComponent::Alarm { properties } => {

                let mut alarm = AlarmComponent::new();

                alarm.properties.reserve(properties.len());

                for property in properties {

                    alarm.properties.push(property.to_model()?);

                Ok(crate::model::component::CalendarComponent::Alarm(alarm))

            crate::parser::types::CalendarComponent::IanaComp { name, lines } => {

                let mut component =

                    crate::model::component::IanaComponent::new(convert_string(name));

                component.properties.reserve(lines.len());

                map_unknown_lines(lines, &mut component.properties)?;

                Ok(crate::model::component::CalendarComponent::IanaComponent(

                    component,

                ))

            crate::parser::types::CalendarComponent::XComp { name, lines } => {

                let mut component = crate::model::component::XComponent::new(convert_string(name));

                component.properties.reserve(lines.len());

                map_unknown_lines(lines, &mut component.properties)?;

                Ok(crate::model::component::CalendarComponent::XComponent(

                    component,

                ))

    }

fn map_unknown_lines(

    lines: &Vec<ContentLine>,

    component_properties: &mut Vec<ComponentProperty>,

) -> anyhow::Result<()> {

    for line in lines {

        let m = line.to_model()?;

        if m.name.starts_with("X-") || m.name.starts_with("x-") {

            component_properties.push(ComponentProperty::XProperty(

                crate::model::property::XProperty {

                    name: m.name,

                    value: m.value,

                    params: m.params,

                },

            ));

        } else {

            component_properties.push(ComponentProperty::IanaProperty(m));

        }

    Ok(())

}