Code shared from the Rust Playground

playground.rs

fn main() {
    foo("abc");
    
}

struct Value();
struct StrDeserializer<'a>(&'a str);
impl<'a> StrDeserializer<'a> {
    fn new(s: &'a str) -> Self {
        StrDeserializer(s)
    }
}

trait Deserializer { }
impl Deserializer for Value { }
impl Deserializer for &Value { }
impl<'a> Deserializer for &mut StrDeserializer<'a> { }

// I want this function to remain unchanged
fn gets_called<D: Deserializer>(_d: D) { }

// I want to change function this into something that can take both &str and Value (or &Value)
fn foo(s: &str) {
    let mut de = StrDeserializer::new(s);
    gets_called(&mut de);
}

fn foo2(v: &Value) {
    gets_called(v);
}