You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: _health_event.rs
    path of file: ./repos/aws-sdk-rust/sdk/internetmonitor/src/types
    
    the code of the file until where you have to start completion: // Code generated by software.amazon.smithy.rust.codegen.smithy-rs. DO NOT EDIT.

/// <p>Information about a health event created in a monitor in Amazon CloudWatch Internet Monitor.</p>
#[non_exhaustive]
#[derive(::std::clone::Clone, ::std::cmp::PartialEq, ::std::fmt::Debug)]
pub struct HealthEvent {
    /// <p>The Amazon 
    
    pub fn build(self) -> ::std::result::Result<crate::types::HealthEvent, ::aws_smithy_types::error::operation::BuildError> {
        ::std::result::Result::Ok(crate::types::HealthEvent {
            event_arn: self.event_arn.ok_or_else(|| {
                ::aws_smithy_types::error::operation::BuildError::missing_field(
                    "event_arn",
                    "event_arn was not specified but it is required when building HealthEvent",
                )
            })?,
            event_id: self.event_id.ok_or_else(|| {
                ::aws_smithy_types::error::operation::BuildError::missing_field(
                    "event_id",
                    "event_id was not specified but it is required when building HealthEvent",
                )
            })?,
            started_at: self.started_at.ok_or_else(|| {
                ::aws_smithy_types::error::operation::BuildError::missing_field(
                    "started_at",
                    "started_at was not specified but it is required when building HealthEvent",
                )
            })?,
            ended_at: self.ended_at,
            created_at: self.created_at,
            last_updated_at: self.last_updated_at.ok_or_else(|| {
                ::aws_smithy_types::error::operation::BuildError::missing_field(
                    "last_updated_at",
                    "last_updated_at was not specified but it is required when building HealthEvent",
                )
            })?,
            impacted_locations: self.impacted_locations.ok_or_else(|| {
                ::aws_smithy_types::error::operation::BuildError::missing_field(
                    "impacted_locations",
                    "impacted_locations was not specified but it is required when building HealthEvent",
                )
            })?,
            status: self.status.ok_or_else(|| {
                ::aws_smithy_types::error::operation::BuildError::missing_field(
                    "status",
                    "status was not specified but it is required when building HealthEvent",
                )
            })?,
            percent_of_total_traffic_impacted: self.percent_of_total_traffic_impacted,
            impact_type: self.impact_type.ok_or_else(|| {
                ::aws_smithy_types::error::operation::BuildError::missing_field(
                    "impact_type",
                    "impact_type was not specified but it is required when building HealthEvent",
                )
            })?,
            health_score_threshold: self.health_score_threshold.unwrap_or_default(),
        })
    }