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: qname.rs
    path of file: ./repos/ruffle/core/src/avm2
    
    the code of the file until where you have to start completion: use crate::avm2::script::TranslationUnit;
use crate::avm2::{Activation, Error, Namespace};
use crate::context::UpdateContext;
use crate::either::Either;
use crate::string::{AvmString, WStr, WString}
    
    pub fn as_uri(&self, mc: &Mutation<'gc>) -> AvmString<'gc> {
        let ns_uri = self.ns.as_uri_opt();
        let ns = match &ns_uri {
            Some(s) if s.is_empty() => return self.name,
            Some(s) => s,
            None => WStr::from_units(b"*"),
        };

        let mut uri = WString::from(ns);
        uri.push_str(WStr::from_units(b"::"));
        uri.push_str(&self.name);
        AvmString::new(mc, uri)
    }