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: _cloud_watch_logging_option_description.rs
    path of file: ./repos/aws-sdk-rust/sdk/kinesisanalyticsv2/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>Describes the Amazon CloudWatch logging option.</p>
#[non_exhaustive]
#[derive(::std::clone::Clone, ::std::cmp::PartialEq, ::std::fmt::Debug)]
pub struct CloudWatchLoggingOptionDescription {
    /// <p>The ID of the CloudWatch logging option description.</p>
    pub cloud_watch_logging_option_id: ::std::option::Option<::std::string::String>,
    /// <p>The Amazon Reso
    
    pub fn build(self) -> ::std::result::Result<crate::types::CloudWatchLoggingOptionDescription, ::aws_smithy_types::error::operation::BuildError> {
        ::std::result::Result::Ok(crate::types::CloudWatchLoggingOptionDescription {
            cloud_watch_logging_option_id: self.cloud_watch_logging_option_id,
            log_stream_arn: self.log_stream_arn.ok_or_else(|| {
                ::aws_smithy_types::error::operation::BuildError::missing_field(
                    "log_stream_arn",
                    "log_stream_arn was not specified but it is required when building CloudWatchLoggingOptionDescription",
                )
            })?,
            role_arn: self.role_arn,
        })
    }