How would you use the 'requires static' directive to declare an optional, compile-time-only dependency that isn't required to be present at runtime?

requires static ModuleName declares a dependency needed only at COMPILE time (for code that references types from that module, perhaps in an optional integration or a method signature using an annotation from an optional library) but is NOT required to be present at RUNTIME -- this is commonly used for optional integrations (like an optional annotation-processing library, or an optional framework integration that a consumer might or might not actually use), letting your module compile successfully against the dependency's types without forcing every single consumer of your module to also have that potentially-unused optional dependency actually present on their own module path at runtime.

module com.example.mylibrary {
    requires static com.google.errorprone.annotations;
    // Code CAN reference @Immutable or similar ErrorProne annotations at COMPILE time,
    // but consumers of mylibrary don't need errorprone.annotations present at RUNTIME
    // if they never actually trigger any code path depending on it being genuinely loaded

    exports com.example.mylibrary.api;
}