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: utils.rs
    path of file: ./repos/cnosdb/query_server/query/src/extension/physical
    
    the code of the file until where you have to start completion: use std::fmt;

use datafusion::physical_plan::{DisplayFormatType, ExecutionPlan};

pub fn one_line(plan: &dyn ExecutionPlan) -> impl fmt::Display + '_ {
    struct Wrapper<'a> {
        plan: &'a dyn ExecutionPlan,
    }
    impl<'a> fmt::Display for Wrapper<'a> {
        fn fmt(&self, f: &mut fm
    
pub fn one_line(plan: &dyn ExecutionPlan) -> impl fmt::Display + '_ {
    struct Wrapper<'a> {
        plan: &'a dyn ExecutionPlan,
    }
    impl<'a> fmt::Display for Wrapper<'a> {
        fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
            let t = DisplayFormatType::Default;
            self.plan.fmt_as(t, f)
        }
    }

    Wrapper { plan }
}