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: jsset_iterator.rs
    path of file: ./repos/boa/core/engine/src/object/builtins
    
    the code of the file until where you have to start completion: //! A Rust API wrapper for Boa's `SetIterator` Builtin ECMAScript Object
use std
    
    fn try_from_js(value: &JsValue, _context: &mut Context) -> JsResult<Self> {
        match value {
            JsValue::Object(o) => Self::from_object(o.clone()),
            _ => Err(JsNativeError::typ()
                .with_message("value is not a SetIterator object")
                .into()),
        }
    }