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: _member_group.rs
    path of file: ./repos/aws-sdk-rust/sdk/qbusiness/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 sub groups that belong to a group.</p>
#[non_exhaustive]
#[derive(::std::clone::Clone, ::std::cmp::PartialEq, ::std::fmt::Debug)]
pub struct MemberGroup {
    /// <p>The name of the sub group.</p>
    pub group_name: ::std::string::String,
    /// <p>The type of the sub group.</p>
    pub r#type: ::std::option::Option<crate::types::MembershipType>,
}
impl MemberGroup {
    /// <p
    
    pub fn build(self) -> ::std::result::Result<crate::types::MemberGroup, ::aws_smithy_types::error::operation::BuildError> {
        ::std::result::Result::Ok(crate::types::MemberGroup {
            group_name: self.group_name.ok_or_else(|| {
                ::aws_smithy_types::error::operation::BuildError::missing_field(
                    "group_name",
                    "group_name was not specified but it is required when building MemberGroup",
                )
            })?,
            r#type: self.r#type,
        })
    }