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: _hours_of_operation_config.rs
    path of file: ./repos/aws-sdk-rust/sdk/connect/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 the hours of operation.</p>
#[non_exhaustive]
#[derive(::std::clone::Clone, ::std::cmp::PartialEq, ::std::fmt::Debug)]
pub struct HoursOfOperationConfig {
    /// <p>The day that the hours of operation applies to.</p>
    pub day: crate::types::HoursOfOperationDays,
    /// <p>The start time that your contact center opens.</p>
    pub start_time: ::std::option::Option<crate::typ
    
    pub fn build(self) -> ::std::result::Result<crate::types::HoursOfOperationConfig, ::aws_smithy_types::error::operation::BuildError> {
        ::std::result::Result::Ok(crate::types::HoursOfOperationConfig {
            day: self.day.ok_or_else(|| {
                ::aws_smithy_types::error::operation::BuildError::missing_field(
                    "day",
                    "day was not specified but it is required when building HoursOfOperationConfig",
                )
            })?,
            start_time: self.start_time,
            end_time: self.end_time,
        })
    }