class SupportedType {
    func requestAccess(completion: (Status) -> Void) { }
}
final class Bluetooth: SupportedType { ... }
final class Location: SupportedType {
    @available(*, unavailable)
    override func requestAccess(completion: (Status) -> Void) { }
    func requestAccess(whenInUseOnly: Bool, completion: (Status) -> Void) { ... }
}

pod 'PermissionWizard/Assets' # Icons and localized strings
pod 'PermissionWizard/Bluetooth'
pod 'PermissionWizard/Calendars'
pod 'PermissionWizard/Camera'
pod 'PermissionWizard/Contacts'
pod 'PermissionWizard/FaceID'
pod 'PermissionWizard/Health'
pod 'PermissionWizard/Home'
pod 'PermissionWizard/LocalNetwork'
pod 'PermissionWizard/Location'
pod 'PermissionWizard/Microphone'
pod 'PermissionWizard/Motion'
pod 'PermissionWizard/Music'
pod 'PermissionWizard/Notifications'
pod 'PermissionWizard/Photos'
pod 'PermissionWizard/Reminders'
pod 'PermissionWizard/Siri'
pod 'PermissionWizard/SpeechRecognition'
pod 'PermissionWizard/Tracking'

Pod::Spec.new do |spec|
  ...
  spec.subspec 'Core' do |core|
    core.source_files = 'Source/Permission.swift', 'Source/Framework'
  end
  spec.subspec 'Assets' do |assets|
    assets.dependency 'PermissionWizard/Core'
    assets.pod_target_xcconfig = { 'SWIFT_ACTIVE_COMPILATION_CONDITIONS' => 'ASSETS' }
    assets.resource_bundles = {
      'Icons' => 'Source/Icons.xcassets',
      'Localizations' => 'Source/Localizations/*.lproj'
    }
  end
  spec.subspec 'Bluetooth' do |bluetooth|
    bluetooth.dependency 'PermissionWizard/Core'
    bluetooth.pod_target_xcconfig = { 'SWIFT_ACTIVE_COMPILATION_CONDITIONS' => 'BLUETOOTH' }
    bluetooth.source_files = 'Source/Supported Types/Bluetooth*.swift'
  end
  ...
  spec.default_subspec = 'Assets', 'Bluetooth', 'Calendars', 'Camera', 'Contacts', 'FaceID', 'Health', 'Home', 'LocalNetwork', 'Location', 'Microphone', 'Motion', 'Music', 'Notifications', 'Photos', 'Reminders', 'Siri', 'SpeechRecognition', 'Tracking'
end

#if BLUETOOTH
    final class Bluetooth { ... }
#endif

#include? "../../../../PermissionWizard.xcconfig"

ENABLED_FEATURES = ASSETS BLUETOOTH ...
SWIFT_ACTIVE_COMPILATION_CONDITIONS = $(inherited) $(ENABLED_FEATURES) CUSTOM_SETTINGS

A53DFF50255AAB8200995A85 /* Settings.xcconfig */ = {isa = PBXFileReference; lastKnownFileType = text.xcconfig; path = Settings.xcconfig; sourceTree = "<group>"; };

B6DAF0412528D771002483A6 /* Release */ = {
    isa = XCBuildConfiguration;
    baseConfigurationReference = A53DFF50255AAB8200995A85 /* Settings.xcconfig */;
    buildSettings = {
        ...
    };
    name = Release;
};

#if BLUETOOTH || !CUSTOM_SETTINGS
    final class Bluetooth { ... }
#endif