Method has

modules/llrt_fetch/src/form_data.rs:121–124

(&self, _ctx: Ctx<'js>, name: String)

            .collect();
        Ok(values
            .into_iter()
            .filter_map(|v| v.into_js(&ctx).ok())
            .collect())
    }

    pub fn has(&self, _ctx: Ctx<'js>, name: String) -> Result<bool> {
        let entries = self.entries.borrow();