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: _dimension.rs
    path of file: ./repos/aws-sdk-rust/sdk/marketplaceagreement/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>Defines the dimensions that the acceptor has purchased from the overall set of dimensions presented in the rate card.</p>
#[non_exhaustive]
#[derive(::std::clone::Clone, ::std::cmp::PartialEq, ::std::fmt::Debug)]
pub struct Dimension {
    /// <p>The name of key value of the dimension.</p>
    pub dimension_key: ::std::string::String,
    /// <p>The number of units of the
    
    pub fn build(self) -> ::std::result::Result<crate::types::Dimension, ::aws_smithy_types::error::operation::BuildError> {
        ::std::result::Result::Ok(crate::types::Dimension {
            dimension_key: self.dimension_key.ok_or_else(|| {
                ::aws_smithy_types::error::operation::BuildError::missing_field(
                    "dimension_key",
                    "dimension_key was not specified but it is required when building Dimension",
                )
            })?,
            dimension_value: self.dimension_value.unwrap_or_default(),
        })
    }