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: _query_arg_profile_config.rs
    path of file: ./repos/aws-sdk-rust/sdk/cloudfront/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>Configuration for query argument-profile mapping for field-level encryption.</p>
#[non_exhaustive]
#[derive(::std::clone::Clone, ::std::cmp::PartialEq, ::std::fmt::Debug)]
pub struct QueryArgProfileConfig {
    /// <p>Flag to set if you want a request to be forwarded to the origin even if the profile specified by the field-level encryption query argument, fle-profile, is unknown.</p>
    pub forward_when_query_arg_profile_is_unknown: bool,
    /// <p>Profiles specified for query argument-profile mapping for field-lev
    
    pub fn build(self) -> ::std::result::Result<crate::types::QueryArgProfileConfig, ::aws_smithy_types::error::operation::BuildError> {
        ::std::result::Result::Ok(crate::types::QueryArgProfileConfig {
            forward_when_query_arg_profile_is_unknown: self.forward_when_query_arg_profile_is_unknown.ok_or_else(|| {
                ::aws_smithy_types::error::operation::BuildError::missing_field(
                    "forward_when_query_arg_profile_is_unknown",
                    "forward_when_query_arg_profile_is_unknown was not specified but it is required when building QueryArgProfileConfig",
                )
            })?,
            query_arg_profiles: self.query_arg_profiles,
        })
    }