lass="block">Get last location from specific provider
                                        Observable will emit <a
                                                href="../../../ru/solodovnikov/rxlocationmanager/ElderLocationException.html"
                                                title="class in ru.solodovnikov.rxlocationmanager"><code>exception
                                            ElderLocationException</code></a> if howOldCanBe is not
                                        null and loca