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: _codegen_job_summary.rs
    path of file: ./repos/aws-sdk-rust/sdk/amplifyuibuilder/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>A summary of the basic information about the code generation job.</p>
#[non_exhaustive]
#[derive(::std::clone::Clone, ::std::cmp::PartialEq, ::std::fmt::Debug)]
pub struct CodegenJobSummary {
    /// <p>The unique ID of the Amplify app associated with the code generation job.</p>
    pub app_id: ::std::string::String,
    /// <p>The name of the backend environment associated with the code generation job.</p>
    pub environment_name: ::std::string::String,
    /// <p>The unique ID for the code generation job summary.</p>
    pub id: ::std::string::String,
    /// <p>The time that the code generation job summary was created.</p>
    pub created_at: ::std::option::Option<::aws_smithy_types::DateTime>,
    /// <p>The time that the code generation job summary was modified.</p>
    pub modified_at: ::std::option::Option<::aws_smithy_types::DateTime>,
}
    
    pub fn build(self) -> ::std::result::Result<crate::types::CodegenJobSummary, ::aws_smithy_types::error::operation::BuildError> {
        ::std::result::Result::Ok(crate::types::CodegenJobSummary {
            app_id: self.app_id.ok_or_else(|| {
                ::aws_smithy_types::error::operation::BuildError::missing_field(
                    "app_id",
                    "app_id was not specified but it is required when building CodegenJobSummary",
                )
            })?,
            environment_name: self.environment_name.ok_or_else(|| {
                ::aws_smithy_types::error::operation::BuildError::missing_field(
                    "environment_name",
                    "environment_name was not specified but it is required when building CodegenJobSummary",
                )
            })?,
            id: self.id.ok_or_else(|| {
                ::aws_smithy_types::error::operation::BuildError::missing_field(
                    "id",
                    "id was not specified but it is required when building CodegenJobSummary",
                )
            })?,
            created_at: self.created_at,
            modified_at: self.modified_at,
        })
    }