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: _ruleset_item.rs
    path of file: ./repos/aws-sdk-rust/sdk/databrew/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>Contains metadata about the ruleset.</p>
#[non_exhaustive]
#[derive(::std::clone::Clone, ::std::cmp::PartialEq, ::std::fmt::Debug)]
pub struct RulesetItem {
    /// <p>The ID of the Amazon Web Services account that owns the ruleset.</p>
    pub account_id: ::std::option::Option<::std::string::String>,
    /// <p>The Amazon Resource Name (ARN) of the user who created the ruleset.</p>
    pub created_by: ::std::option::Option<::std::string::String>,
    /// <p>The date and time that the ruleset was c
    
    pub fn build(self) -> ::std::result::Result<crate::types::RulesetItem, ::aws_smithy_types::error::operation::BuildError> {
        ::std::result::Result::Ok(crate::types::RulesetItem {
            account_id: self.account_id,
            created_by: self.created_by,
            create_date: self.create_date,
            description: self.description,
            last_modified_by: self.last_modified_by,
            last_modified_date: self.last_modified_date,
            name: self.name.ok_or_else(|| {
                ::aws_smithy_types::error::operation::BuildError::missing_field(
                    "name",
                    "name was not specified but it is required when building RulesetItem",
                )
            })?,
            resource_arn: self.resource_arn,
            rule_count: self.rule_count.unwrap_or_default(),
            tags: self.tags,
            target_arn: self.target_arn.ok_or_else(|| {
                ::aws_smithy_types::error::operation::BuildError::missing_field(
                    "target_arn",
                    "target_arn was not specified but it is required when building RulesetItem",
                )
            })?,
        })
    }