Macro details 

macro_rules! details {
    {$($k: expr => $v: expr),* $(,)?} => { ... };
}

Creates a details HashMap from a list of key-value pairs.

This macro takes a list of key-value pairs and returns a HashMap with the provided keys and values. The keys and values are converted to String instances before being added to the HashMap.

Example

let details = details! { “serial” => “01234567”, };