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: _certificate_list.rs
    path of file: ./repos/aws-sdk-rust/sdk/iotwireless/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>List of sidewalk certificates.</p>
#[non_exhaustive]
#[derive(::std::clone::Clone, ::std::cmp::PartialEq, ::std::fmt::Debug)]
pub struct CertificateList {
    /// <p>The certificate chain algorithm provided by sidewalk.</p>
    pub signing_alg: crate::types::SigningAlg,
    /// <p>The value of the chosen sidewalk certificate.</p>
    pub value: ::std::string::String,
}
impl CertificateList {
    ///
    
    pub fn build(self) -> ::std::result::Result<crate::types::CertificateList, ::aws_smithy_types::error::operation::BuildError> {
        ::std::result::Result::Ok(crate::types::CertificateList {
            signing_alg: self.signing_alg.ok_or_else(|| {
                ::aws_smithy_types::error::operation::BuildError::missing_field(
                    "signing_alg",
                    "signing_alg was not specified but it is required when building CertificateList",
                )
            })?,
            value: self.value.ok_or_else(|| {
                ::aws_smithy_types::error::operation::BuildError::missing_field(
                    "value",
                    "value was not specified but it is required when building CertificateList",
                )
            })?,
        })
    }