How to implement an Obj-C protocol with custom getter name in Swift

Implementation.swift

class SomeClass: SomeProtocol {

    private var _enabled: Bool = false
    var enabled: Bool {
        @objc(isEnabled) get { return _enabled }
        set { _enabled = newValue }
    }

}

Protocol.h

@protocol SomeProtocol <NSObject>
@property (nonatomic, getter=isEnabled) BOOL enabled;
@end

You can expose a Swift property or function to the Objective-C runtime with a different name, using the @objc(name) attribute. However, exposing a different name for only the getter, requires that you explicitly define a setter and getter individually, which again requires that you use another (private) variable for backing.