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_model_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 model. This object contains the asset property definitions that you define in the composite model.</p>
#[non_exhaustive]
#[derive(::std::clone::Clone, ::std::cmp::PartialEq, ::std::fmt::Debug)]
pub struct AssetModelCompositeModel {
    /// <p>The name of the composite model.</p>
    pub name: ::std::string::String,
    /// <p>The description of the composite model.</p>
    pub description: ::std::option::Option<::std::string::String>,
    /// <p>The type of the composite model. For alarm composite models, this type is <code>AWS
    
    pub fn build(self) -> ::std::result::Result<crate::types::AssetModelCompositeModel, ::aws_smithy_types::error::operation::BuildError> {
        ::std::result::Result::Ok(crate::types::AssetModelCompositeModel {
            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 AssetModelCompositeModel",
                )
            })?,
            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 AssetModelCompositeModel",
                )
            })?,
            properties: self.properties,
            id: self.id,
            external_id: self.external_id,
        })
    }