Contact: list of members is now a Set (was: List)

import android.provider.ContactsContract.RawContacts.Data

/**

 * Represents a "cached group membership" row. Cached group memberships exist only

 * for one reason, which _only_ applies to the vCard4 (KIND/MEMBER) group method:

 *

 * Every group has its list of members. When a contact's group memberships are changed,

 * the contact is automatically set to dirty, but the group itself is not!

 *

 * So we keep a copy of all group membership rows as "cached memberships". At the

 * beginning of every sync, the group memberships of every contact are compared with

 * its cached group memberships. If they differ, the respective contact group

 * is set to dirty (because its memberships have changed).

 *

 * Cached group memberships must not be used for anything else that detecting dirty groups.

 */

object CachedGroupMembership {

    const val CONTENT_ITEM_TYPE = "x.davdroid/cached-group-membership"

import at.bitfire.vcard4android.property.XAbDate

import ezvcard.VCardVersion

import ezvcard.io.text.VCardReader

import ezvcard.parameter.EmailType

import ezvcard.parameter.TelephoneType

import ezvcard.property.*

import org.apache.commons.lang3.builder.HashCodeBuilder

import org.apache.commons.lang3.builder.ReflectionToStringBuilder

import java.io.OutputStream

import java.io.Reader

import java.util.*

import kotlin.collections.HashSet

/**

 * Data class for a contact; between vCards and the Android contacts provider.

    var group = false

    /** list of UIDs of group members without urn:uuid prefix (only meaningful if [group] is true) */

    val members = LinkedList<String>()

    val members = mutableSetOf<String>()

    var displayName: String? = null

    var prefix: String? = null

            kind = Kind.group()

            members += Member("member1")

        })

        assertEquals("member1", c.members.first)

        assertEquals("member1", c.members.first())

    }

    @Test

            kind = Kind.group()

            members += Member("urn:uuid:be829cf2-4244-42f8-bd4c-ab39b4b5fcd3")

        })

        assertEquals("be829cf2-4244-42f8-bd4c-ab39b4b5fcd3", c.members.first)

        assertEquals("be829cf2-4244-42f8-bd4c-ab39b4b5fcd3", c.members.first())

    }

    @Test