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: _participating_server.rs
    path of file: ./repos/aws-sdk-rust/sdk/mgn/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>Server participating in Job.</p>
#[non_exhaustive]
#[derive(::std::clone::Clone, ::std::cmp::PartialEq, ::std::fmt::Debug)]
pub struct ParticipatingServer {
    /// <p>Participating server Source Server ID.</p>
    pub source_server_id: ::std::string::String,
    /// <p>Participating server launch status.</p>
    pub launch_status: ::std::option::Option<crate::types::LaunchStatus>,
    /// <p>Participating server's launched ec2 in
    
    pub fn build(self) -> ::std::result::Result<crate::types::ParticipatingServer, ::aws_smithy_types::error::operation::BuildError> {
        ::std::result::Result::Ok(crate::types::ParticipatingServer {
            source_server_id: self.source_server_id.ok_or_else(|| {
                ::aws_smithy_types::error::operation::BuildError::missing_field(
                    "source_server_id",
                    "source_server_id was not specified but it is required when building ParticipatingServer",
                )
            })?,
            launch_status: self.launch_status,
            launched_ec2_instance_id: self.launched_ec2_instance_id,
            post_launch_actions_status: self.post_launch_actions_status,
        })
    }