pub type LPALSOURCE3I64SOFT = Option<unsafe extern "C" fn(_: u32, _: i32, _: i64, _: i64, _: i64)>;
enum LPALSOURCE3I64SOFT { None, Some(unsafe extern "C" fn(_: u32, _: i32, _: i64, _: i64, _: i64)), }
No value.
Some value of type T.
T