Macro getfn::symbol_static

macro_rules! symbol_static {
    () => { ... };
    (($($tt:tt)*) $vis:vis static $name:ident: $ty:ty; $($tta:tt)*) => { ... };
    (($($tt:tt)*) $vis:vis static mut $name:ident: $ty:ty; $($tta:tt)*) => { ... };
}