typealias CGColorRef = CGColor

class CGColor {
}

typealias CGColorSpaceRef = CGColorSpace

class CGColorSpace {
}

typealias CGContextRef = CGContext

class CGContext {
}

typealias CGDataConsumerRef = CGDataConsumer

class CGDataConsumer {
}

typealias CGDataProviderRef = CGDataProvider

class CGDataProvider {
}

typealias CGDisplayModeRef = CGDisplayMode

class CGDisplayMode {
}

typealias CGDisplayStreamRef = CGDisplayStream

class CGDisplayStream {
}

typealias CGDisplayStreamUpdateRef = CGDisplayStreamUpdate

class CGDisplayStreamUpdate {
}

typealias CGEventRef = CGEvent

class CGEvent {
}

typealias CGEventSourceRef = CGEventSource

class CGEventSource {
}

typealias CGFontRef = CGFont

class CGFont {
}

typealias CGFunctionRef = CGFunction

class CGFunction {
}

typealias CGGradientRef = CGGradient

class CGGradient {
}

typealias CGImageRef = CGImage

class CGImage {
}

typealias CGLayerRef = CGLayer

class CGLayer {
}

typealias CGMutablePathRef = CGMutablePath

class CGMutablePath {
}

typealias CGPathRef = CGPath

class CGPath {
}

typealias CGPatternRef = CGPattern

class CGPattern {
}

typealias CGPDFDocumentRef = CGPDFDocument

class CGPDFDocument {
}

typealias CGPDFPageRef = CGPDFPage

class CGPDFPage {
}

typealias CGPSConverterRef = CGPSConverter

class CGPSConverter {
}

typealias CGShadingRef = CGShading

class CGShading {
}