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: test_zc.rs
    path of file: ./repos/rust-zc/tests
    
    the code of the file until where you have to start completion: use zc::aliasable::{boxed::AliasableBox, vec::AliasableVec};
use zc::{Dependant, Zc};

#[derive(Dependant)]
pub struct
    
fn test_struct_with_error() {
    #[derive(PartialEq, Debug, Dependant)]
    pub struct StructWithError<'a>(&'a str);

    impl<'a> core::convert::TryFrom<&'a str> for StructWithError<'a> {
        type Error = ();

        fn try_from(_: &'a str) -> Result<Self, Self::Error> {
            Err(())
        }
    }

    let owner = String::from("hello");
    let result = zc::try_from!(owner, StructWithError, str);

    assert_eq!(result.unwrap_err(), ((), String::from("hello")));
}