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_profiles.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>Query argument-profile mapping for field-level encryption.</p>
#[non_exhaustive]
#[derive(::std::clone::Clone, ::std::cmp::PartialEq, ::std::fmt::Debug)]
pub struct QueryArgProfiles {
    /// <p>Number of profiles for query argument-profile mapping for field-level encryption.</p>
    pub quantity: i32,
    /// <p>Number of items for query argument-profile mapping for field
    
    pub fn build(self) -> ::std::result::Result<crate::types::QueryArgProfiles, ::aws_smithy_types::error::operation::BuildError> {
        ::std::result::Result::Ok(crate::types::QueryArgProfiles {
            quantity: self.quantity.ok_or_else(|| {
                ::aws_smithy_types::error::operation::BuildError::missing_field(
                    "quantity",
                    "quantity was not specified but it is required when building QueryArgProfiles",
                )
            })?,
            items: self.items,
        })
    }