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: shape_vpc.rs
    path of file: ./repos/aws-sdk-rust/sdk/route53/src/protocol_serde
    
    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.
pub fn ser_vpc(
    input: &crate::types::Vpc,
    writer: ::aws_smithy_xml::encode::ElWriter,
) -> Result<(), ::aws_smithy_types::error::operation::SerializationError> {
    #[allow(unused_mut)]
    let mut scope = writer.finish();
    if let Some(var_1) = &input.vpc_region {
        let mut inner_writer = scope.start_el("VPCRegion").finish();
        inner_writer.data(var_1.as_str());
    }
    if let Some(var_2) = &input.vpc_id {
        let mut inner_writer = scope.start_el("VPCId").finish();
        inner_writer.data(var_2.as_str());
    }
    scope.finish();
    Ok(())
}

#[allow(clippy::needless_question_mark)]
pub fn de_vpc(decoder: &mut ::aws_smithy_xml::decode::ScopedDecoder) -> Result<crate::types::Vpc, ::aws_smithy_xml::decode::XmlDecodeError> {
    #[allow(unused_mut)]
    let mut builder = crate::types::Vpc::builder();
    while let Some(mut tag) = decoder.next_tag() {
        match tag.start_el() {
            s if s.matches("VPCRegion") /* VPCRegion com.amazonaws.route53#VPC$VPCRegion */ =>  {
                let var_3 =
                    Some(
                        Result::<crate::types::VpcRegion, ::aws_smithy_xml::decode::XmlDecodeError>::Ok(
                            crate:
    
pub fn de_vpc(decoder: &mut ::aws_smithy_xml::decode::ScopedDecoder) -> Result<crate::types::Vpc, ::aws_smithy_xml::decode::XmlDecodeError> {
    #[allow(unused_mut)]
    let mut builder = crate::types::Vpc::builder();
    while let Some(mut tag) = decoder.next_tag() {
        match tag.start_el() {
            s if s.matches("VPCRegion") /* VPCRegion com.amazonaws.route53#VPC$VPCRegion */ =>  {
                let var_3 =
                    Some(
                        Result::<crate::types::VpcRegion, ::aws_smithy_xml::decode::XmlDecodeError>::Ok(
                            crate::types::VpcRegion::from(
                                ::aws_smithy_xml::decode::try_data(&mut tag)?.as_ref()
                            )
                        )
                        ?
                    )
                ;
                builder = builder.set_vpc_region(var_3);
            }
            ,
            s if s.matches("VPCId") /* VPCId com.amazonaws.route53#VPC$VPCId */ =>  {
                let var_4 =
                    Some(
                        Result::<::std::string::String, ::aws_smithy_xml::decode::XmlDecodeError>::Ok(
                            ::aws_smithy_xml::decode::try_data(&mut tag)?.as_ref()
                            .into()
                        )
                        ?
                    )
                ;
                builder = builder.set_vpc_id(var_4);
            }
            ,
            _ => {}
        }
    }
    Ok(builder.build())
}