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: _audience_model_metric.rs
    path of file: ./repos/aws-sdk-rust/sdk/cleanroomsml/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>The audience model metrics.</p>
#[non_exhaustive]
#[derive(::std::clone::Clone, ::std::cmp::PartialEq, ::std::fmt::Debug)]
pub struct AudienceModelMetric {
    /// <p>The audience model metric.</p>
    pub r#type: crate::types::AudienceModelMetricType,
    /// <p>The number of users that were used to generate these model metrics.</p>
    pub for_top_k_item_predictions: i32,
    
    pub fn build(self) -> ::std::result::Result<crate::types::AudienceModelMetric, ::aws_smithy_types::error::operation::BuildError> {
        ::std::result::Result::Ok(crate::types::AudienceModelMetric {
            r#type: self.r#type.ok_or_else(|| {
                ::aws_smithy_types::error::operation::BuildError::missing_field(
                    "r#type",
                    "r#type was not specified but it is required when building AudienceModelMetric",
                )
            })?,
            for_top_k_item_predictions: self.for_top_k_item_predictions.ok_or_else(|| {
                ::aws_smithy_types::error::operation::BuildError::missing_field(
                    "for_top_k_item_predictions",
                    "for_top_k_item_predictions was not specified but it is required when building AudienceModelMetric",
                )
            })?,
            value: self.value.ok_or_else(|| {
                ::aws_smithy_types::error::operation::BuildError::missing_field(
                    "value",
                    "value was not specified but it is required when building AudienceModelMetric",
                )
            })?,
        })
    }