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: nested_update_many_inside_update.rs
    path of file: ./repos/prisma-engines/query-engine/connector-test-kit-rs/query-engine-tests/tests/writes/nested_mutations/already_converted
    
    the code of the file until where you have to start completion: use query_engine_tests::*;

#[test_suite]
// update_many_inside_update
mod um_inside_update {
    use query_engine_tests::{assert_error, run_query, run_query_json, DatamodelWithParams, Runner, TestResult};
    use query_test_macros::relation_link_test;

    // "A 1-n relation" should "error if trying to use nestedUpdateMany"
    #[relation_link_test(on_parent = "ToOneOpt", on_child = "ToOneOpt")]
    async fn one2n_rel_error_nested_um(runner: &Runner, t: &DatamodelWithParams) -> TestResult<()> {
        let parent = t.parent().parse(
            run_query_json!(
         
    
    async fn setup_data(runner: &Runner, t: &DatamodelWithParams) -> TestResult<String> {
        let parent = t.parent().parse(
            run_query_json!(
                runner,
                format!(
                    r#"mutation {{
                      createOneParent(data: {{
                        p: "p1", p_1: "p", p_2: "1"
                        childrenOpt: {{
                          create: [{{c: "c1", c_1: "foo", c_2: "bar"}},{{c: "c2", c_1: "fo", c_2: "lo"}}]
                        }}
                      }}){{
                        {selection}
                        childrenOpt{{
                          c
                        }}
                      }}
                    }}"#,
                    selection = t.parent().selection()
                )
            ),
            &["data", "createOneParent"],
        )?;

        run_query_json!(
            runner,
            format!(
                r#"mutation {{
                  createOneParent(data: {{
                    p: "p2", p_1: "p", p_2: "2"
                    childrenOpt: {{
                      create: [{{c: "c3", c_1: "ao", c_2: "bo"}},{{c: "c4", c_1: "go", c_2: "zo"}}]
                    }}
                  }}){{
                    {selection}
                    childrenOpt{{
                      c
                    }}
                  }}
                }}"#,
                selection = t.parent().selection()
            )
        );

        Ok(parent)
    }