@Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;

        TtlCallable<?> that = (TtlCallable<?>) o;

        return callable.equals(that.callable);
    }
unwrap to the original/underneath {@link Callable}.

@see TtlUnwrap#unwrap(Object)
@since 2.11.4
ttl2-compatible/src/main/java/com/alibaba/ttl/TtlCallable.java