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: _record.rs
    path of file: ./repos/aws-sdk-rust/sdk/firehose/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>The unit of data in a delivery stream.</p>
#[non_exhaustive]
#[derive(::std::clone::Clone, ::std::cmp::PartialEq, ::std::fmt::Debug)]
pub struct Record {
    /// <p>The data blob, which is base64-encoded when the blob is serialized. The maximum size of the data blob, before base64-encoding, is 1,000 KiB.</p>
    pub data: ::aws
    
    pub fn build(self) -> ::std::result::Result<crate::types::Record, ::aws_smithy_types::error::operation::BuildError> {
        ::std::result::Result::Ok(crate::types::Record {
            data: self.data.ok_or_else(|| {
                ::aws_smithy_types::error::operation::BuildError::missing_field(
                    "data",
                    "data was not specified but it is required when building Record",
                )
            })?,
        })
    }