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{
  "apiKey": 13,
  "type": "request",
  "listeners": ["zkBroker", "broker"],
  "name": "LeaveGroupRequest",
  // Version 1 and 2 are the same as version 0.
  //
  // Version 3 defines batch processing scheme with group.instance.id + member.id for identity
  //
  // Version 4 is the first flexible version.
  "validVersions": "0-4",
  "flexibleVersions": "4+",
  "fields": [
    { "name": "GroupId", "type": "string", "versions": "0+", "entityType": "groupId",
      "about": "The ID of the group to leave." },
    { "name": "MemberId", "type": "string", "versions": "0-2",
      "about": "The member ID to remove from the group." },
    { "name": "Members", "type": "[]MemberIdentity", "versions": "3+",
      "about": "List of leaving member identities.", "fields": [
      { "name": "MemberId", "type": "string", "versions": "3+",
        "about": "The member ID to remove from the group." },
      { "name": "GroupInstanceId", "type": "string",
        "versions": "3+", "nullableVersions": "3+", "default": "null",
        "about": "The group instance ID to remove from the group." },
      // New Field //
      { "name": "Reason", "type": "string", "versions": "4+",
        "nullableVersions": "4+", "taggedVersions": "4+", "tag": 0, "default": "null",
        "about": "The reason" }
    ]}
  ]
}