Convert `ImapSettings` to Kotlin

package com.fsck.k9.mail.store.imap;

import com.fsck.k9.mail.AuthType;

import com.fsck.k9.mail.ConnectionSecurity;

package com.fsck.k9.mail.store.imap

import com.fsck.k9.mail.AuthType

import com.fsck.k9.mail.ConnectionSecurity

/**

 * Settings source for IMAP. Implemented in order to remove coupling between {@link ImapStore} and {@link ImapConnection}.

 * Settings source for IMAP. Implemented in order to remove coupling between [ImapStore] and [ImapConnection].

 */

interface ImapSettings {

    String getHost();

    int getPort();

    ConnectionSecurity getConnectionSecurity();

    AuthType getAuthType();

    String getUsername();

    String getPassword();

    String getClientCertificateAlias();

    boolean useCompression();

    String getPathPrefix();

    void setPathPrefix(String prefix);

    String getPathDelimiter();

    void setPathDelimiter(String delimiter);

    void setCombinedPrefix(String prefix);

internal interface ImapSettings {

    val host: String

    val port: Int

    val connectionSecurity: ConnectionSecurity

    val authType: AuthType

    val username: String

    val password: String?

    val clientCertificateAlias: String?

    fun useCompression(): Boolean

    var pathPrefix: String?

    var pathDelimiter: String?

    fun setCombinedPrefix(prefix: String?)

}

import com.fsck.k9.mail.ConnectionSecurity

internal class SimpleImapSettings(

    private val host: String,

    private val port: Int = 0,

    private val connectionSecurity: ConnectionSecurity = ConnectionSecurity.NONE,

    private val authType: AuthType,

    private val username: String,

    private val password: String? = null,

    override val host: String,

    override val port: Int = 0,

    override val connectionSecurity: ConnectionSecurity = ConnectionSecurity.NONE,

    override val authType: AuthType,

    override val username: String,

    override val password: String? = null,

    private val useCompression: Boolean = false

) : ImapSettings {

    private var pathPrefix: String? = null

    private var pathDelimiter: String? = null

    private var combinedPrefix: String? = null

    override fun getHost(): String = host

    override fun getPort(): Int = port

    override fun getConnectionSecurity(): ConnectionSecurity = connectionSecurity

    override fun getAuthType(): AuthType = authType

    override fun getUsername(): String = username

    override fun getPassword(): String? = password

    override fun getClientCertificateAlias(): String? = null

    override val clientCertificateAlias: String? = null

    override fun useCompression(): Boolean = useCompression

    override fun getPathPrefix(): String? = pathPrefix

    override fun setPathPrefix(prefix: String?) {

        pathPrefix = prefix

    }

    override fun getPathDelimiter(): String? = pathDelimiter

    override var pathPrefix: String? = null

    override var pathDelimiter: String? = null

    override fun setPathDelimiter(delimiter: String?) {

        pathDelimiter = delimiter

    }

    override fun setCombinedPrefix(prefix: String?) {

        combinedPrefix = prefix

    }

    override fun setCombinedPrefix(prefix: String?) = Unit

}