/// Creates a virtual method table.
/// # Behaviour
/// Each time macro is used, it will create new virtual method table via [`Box::leak`]
/// ```
/// # use faithe::vmt
/// fn first() {
/// println!("First");
/// }
/// fn second() {
/// println!("Second");
/// }
///
/// let vmt = vmt! {
/// first,
/// second
/// };
/// ```