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: _group_query.rs
    path of file: ./repos/aws-sdk-rust/sdk/resourcegroups/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>A mapping of a query attached to a resource group that determines the Amazon Web Services resources that are members of the group.</p>
#[non_exhaustive]
#[derive(::std::clone::Clone, ::std::cmp::PartialEq, ::std::fmt::Debug)]
pub struc
    
    pub fn build(self) -> ::std::result::Result<crate::types::GroupQuery, ::aws_smithy_types::error::operation::BuildError> {
        ::std::result::Result::Ok(crate::types::GroupQuery {
            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 GroupQuery",
                )
            })?,
            resource_query: self.resource_query,
        })
    }