Function retro_cheat_set 

#[unsafe(no_mangle)]
pub unsafe extern "C" fn retro_cheat_set(
    index: c_uint,
    enabled: bool,
    code: *const c_char,
)

Called by the frontend whenever a cheat should be applied.

The format is core-specific but this function lacks a return value, so a Core can’t tell the frontend if it failed to parse a code.