//! Raw Metamod:Source ABI declarations for the supported 64-bit builds.
//!
//! The **1.12 build 1226** and **2.0 build 1469** layouts differ in the middle of
//! `ISmmAPI`, so neither layout can be used before the common prefix has
//! identified the running version. 2.0 build 1472 keeps 1469's layouts.
//!
//! Each version hooks through its own library: [`sourcehook`] in 1.12, and
//! [`khook`] in 2.0.