Macro polkadot_node_core_pvf_common::decl_worker_main

macro_rules! decl_worker_main {
    ($expected_command:expr, $entrypoint:expr, $worker_version:expr, $worker_version_hash:expr $(,)*) => { ... };
}

Use this macro to declare a fn main() {} that will create an executable that can be used for spawning the desired worker.