Function DHCPClientPreferencesCopyApplicationOptions 

pub unsafe extern "C-unwind" fn DHCPClientPreferencesCopyApplicationOptions(
    application_id: &CFString,
    count: NonNull<CFIndex>,
) -> *mut u8

Available on crate feature DHCPClientPreferences only.

Copies the requested DHCP options for the given application ID.

Parameter applicationID: The application’s preference ID, for example “com.apple.SystemPreferences”.

Parameter count: The number of elements in the returned array.

Returns: Returns the list of options for the given application ID, or NULL if no options are defined or an error occurred.

When you are finished, use free() to release a non-NULL return value.

Safety

count must be a valid pointer.