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: _replica_global_secondary_index.rs
    path of file: ./repos/aws-sdk-rust/sdk/dynamodb/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>Represents the properties of a replica global secondary index.</p>
#[non_exhaustive]
#[derive(::std::clone::Clone, ::std::cmp::PartialEq, ::std::fmt::Debug)]
pub struct ReplicaGlobalSecondaryIndex {
    /// <p>The name of the global secondary index.</p>
    pub index_name: ::std::string::String,
    //
    
    pub fn build(self) -> ::std::result::Result<crate::types::ReplicaGlobalSecondaryIndex, ::aws_smithy_types::error::operation::BuildError> {
        ::std::result::Result::Ok(crate::types::ReplicaGlobalSecondaryIndex {
            index_name: self.index_name.ok_or_else(|| {
                ::aws_smithy_types::error::operation::BuildError::missing_field(
                    "index_name",
                    "index_name was not specified but it is required when building ReplicaGlobalSecondaryIndex",
                )
            })?,
            provisioned_throughput_override: self.provisioned_throughput_override,
        })
    }