# MusicItemCollection A collection of music items. ``` struct MusicItemCollection where MusicItemType : MusicItem ``` ## Topics ### Operators [`static func += (inout MusicItemCollection, MusicItemCollection)`](/documentation/MusicKit/MusicItemCollection/+=(_:_:)) Appends contents of a collection representing a next batch, in the right hand side, to the existing collection on the left hand side. ### Initializers [`init(S)`](/documentation/MusicKit/MusicItemCollection/init(_:)) ### Instance Properties [`var hasNextBatch: Bool`](/documentation/MusicKit/MusicItemCollection/hasNextBatch) A Boolean value that indicates whether the collection has information that allows it to fetch a subsequent batch of items. [`var title: String?`](/documentation/MusicKit/MusicItemCollection/title) An optional title for the collection. ### Instance Methods [`func nextBatch(limit: Int?) async throws -> MusicItemCollection?`](/documentation/MusicKit/MusicItemCollection/nextBatch(limit:)-432i0) Fetches the next batch of items asynchronously. [`func nextBatch(limit: Int?) async throws -> MusicItemCollection?`](/documentation/MusicKit/MusicItemCollection/nextBatch(limit:)-ywue) Fetches the next batch of items asynchronously. ## Relationships ### Conforms To [`Equatable`](/documentation/Swift/Equatable) [`Hashable`](/documentation/Swift/Hashable) [`Sequence`](/documentation/Swift/Sequence) [`RandomAccessCollection`](/documentation/Swift/RandomAccessCollection) [`SendableMetatype`](/documentation/Swift/SendableMetatype) [`ExpressibleByArrayLiteral`](/documentation/Swift/ExpressibleByArrayLiteral) [`CustomStringConvertible`](/documentation/Swift/CustomStringConvertible) [`Encodable`](/documentation/Swift/Encodable) [`Collection`](/documentation/Swift/Collection) [`BidirectionalCollection`](/documentation/Swift/BidirectionalCollection) [`CustomDebugStringConvertible`](/documentation/Swift/CustomDebugStringConvertible) [`Escapable`](/documentation/Swift/Escapable) [`Copyable`](/documentation/Swift/Copyable) [`Decodable`](/documentation/Swift/Decodable) [`Sendable`](/documentation/Swift/Sendable) --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)