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package com.example.demo;

import org.springframework.lang.NonNull;

import java.util.UUID;

public class Account {
    private final UUID id;
    private final String name;

uzilan

package packages

import kotlin.random.Random

data class Stamp(val price: Double)
data class Package(val address: String, var stamp: Stamp? = null) {
    fun unpack(): Any = TODO("Not yet implemented")
}

object MailService {

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fun letExample() {
    val content = openPackage()?.let {
        registerAddress(it.address)
        it.unpack()
    } ?: "nothing in there"

    playAroundWith(content)
}

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fun alsoExample() {
    val address = "Someone somewhere 12345"
    val stamp = Stamp(50.0)
    val pack = Package(address, stamp)

    MailService.sendPackage(pack).also {
        informCustomer(it.address)
    }
}

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fun applyExample() {
    val address = "Someone somewhere 12345"
    val pack = Package(address)
        .apply { this.stamp = Stamp(50.0) }

    MailService.sendPackage(pack)
}

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fun runExample() {
    val address = "Someone somewhere 12345"
    val stamp = Stamp(50.0)
    val brokenPackage = Package(address, stamp)
    val pack = brokenPackage.run {
        Package(this.address, this.stamp)
    }

    MailService.sendPackage(pack)
}

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package calendarish;

import java.time.DayOfWeek;
import java.time.Duration;
import java.time.LocalDate;
import java.time.Month;
import java.time.ZoneId;
import java.time.temporal.ChronoField;
import java.time.temporal.WeekFields;
import java.util.Calendar;

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package some.system;

import third.party.Coords;
import third.party.CoordsConverter;

public class UntrustworthyCoordsConverterFacade {
    public static ImmutableCoords fromRT90ToWGS84(ImmutableCoords rt90) {
        Coords coordsToSend = new Coords(rt90.x, rt90.y);
        Coords transformedCoords = CoordsConverter.fromRT90ToWGS84(coordsToSend);

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package some.system;

public class ImmutableCoords {
    public final double x;
    public final double y;

    public ImmutableCoords(final double x, final double y) {
        this.x = x;
        this.y = y;
    }

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package third.party;

public class CoordsConverter {
    public static Coords fromRT90ToWGS84(Coords coords) {
        // some complex logic
    }
    
    // more conversions
}