Function LLVMRustPrintModule 

pub(crate) unsafe extern "C" fn LLVMRustPrintModule<'ll>(
    M: Module<'ll>,
    Output: *const c_char,
    Demangle: extern "C" fn(*const c_char, size_t, *mut c_char, size_t) -> size_t,
) -> LLVMRustResult