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: _asset_composite_model.rs
    path of file: ./repos/aws-sdk-rust/sdk/iotsitewise/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 information about a composite model in an asset. This object contains the asset's properties that you define in the composite model.</p>
#[non_exhaustive]
#[derive(::std::clone::Clone, ::std::cmp::PartialEq, ::std::fmt::Debug)]
pub struct AssetCompositeModel {
    /// <p>The name of the composite model.</p>
    pub name: ::std::string::String,
    /// <p>The description of t
    
    pub fn build(self) -> ::std::result::Result<crate::types::AssetCompositeModel, ::aws_smithy_types::error::operation::BuildError> {
        ::std::result::Result::Ok(crate::types::AssetCompositeModel {
            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 AssetCompositeModel",
                )
            })?,
            description: self.description,
            r#type: self.r#type.ok_or_else(|| {
                ::aws_smithy_types::error::operation::BuildError::missing_field(
                    "r#type",
                    "r#type was not specified but it is required when building AssetCompositeModel",
                )
            })?,
            properties: self.properties.ok_or_else(|| {
                ::aws_smithy_types::error::operation::BuildError::missing_field(
                    "properties",
                    "properties was not specified but it is required when building AssetCompositeModel",
                )
            })?,
            id: self.id,
            external_id: self.external_id,
        })
    }