Static HMCharacteristicTypeLabelNamespace 

pub unsafe static HMCharacteristicTypeLabelNamespace: &'static NSString

Available on crate feature HMCharacteristicTypes only.

Characteristic type for label namespace used to label the services on an accessory with multiple services of the same type. The value of the characteristic is one of the values defined for HMCharacteristicValueLabelNamespace.

See also Apple’s documentation