Function uikit_sys::CFStringGetBytes

pub unsafe extern "C" fn CFStringGetBytes(
    theString: CFStringRef, 
    range: CFRange, 
    encoding: CFStringEncoding, 
    lossByte: UInt8, 
    isExternalRepresentation: Boolean, 
    buffer: *mut UInt8, 
    maxBufLen: CFIndex, 
    usedBufLen: *mut CFIndex
) -> CFIndex