Some methods in the Foreign Function & Memory API are unsafe. When used improperly, these methods can lead to loss of memory safety which can result in a JVM crash or silent memory corruption. Accordingly, the unsafe methods in the FFM API are *restricted*. This means that their use is permitted, but by default causes a warning to be issued at run time. To indicate where run time warnings may occur, a new javac lint option, `-Xlint:restricted`, causes warnings to be issued at compile time if restricted methods are called in source code. These compile-time warnings can be suppressed using `@SuppressWarnings("restricted")`.