Derive Macro JsonDeserialize 

#[derive(JsonDeserialize)]
{
    // Attributes available to this derive:
    #[rename]
}

Derive an implementation of the JsonDeserialize trait.

This requires the struct derived for implement Default. Fields which aren’t present in the serialization will be left to their Default initialization. If you wish to detect if a field was omitted, please wrap it in Option.

As a procedural macro, this will panic causing a compile-time error on any unexpected input.