```rust
use json_map_serializer::to_map;
use serde_json::Value;
fn main() {
let query = (("foo", "bar"), ("baz", "qux"));
let map = to_map(query).unwrap();
let mut result = serde_json::Map::new();
result.insert(String::from("foo"), Value::String(String::from("bar")));
result.insert(String::from("baz"), Value::String(String::from("qux")));
assert_eq!(result, map);
}
```