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# Deprecated symbols

Review unsupported symbols and their replacements.

## Topics

### Deprecated type methods

[`class func new() -> Self`](/documentation/CoreData/NSManagedObjectContext/new())

### Deprecated instance methods

[`init(concurrencyType: NSManagedObjectContextConcurrencyType)`](/documentation/CoreData/NSManagedObjectContext/init(concurrencyType:))

Creates a context that uses the specified concurrency type.

[`convenience init()`](/documentation/CoreData/NSManagedObjectContext/init())

[`func lock()`](/documentation/CoreData/NSManagedObjectContext/lock())

Attempts to acquire a lock on the context.

[`func tryLock() -> Bool`](/documentation/CoreData/NSManagedObjectContext/tryLock())

Attempts to acquire a lock.

[`func unlock()`](/documentation/CoreData/NSManagedObjectContext/unlock())

Relinquishes a previously acquired lock.


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