Creates a dynamic store key that can be used to access the per-service network configuration information.
- macOS 10.1+
The allocator that should be used to allocate memory for this key. This parameter may be
NULLin which case the current default allocator is used. If this value is not a valid
CFAllocator, the behavior is undefined.
The desired domain, such as the requested configuration or the current state.
The service ID or a regular expression pattern.
The specific global entity, such as IPv4 or DNS.