def keychain
      out = FFI::MemoryPointer.new :pointer
      status = Sec.SecKeychainItemCopyKeychain(self,out)
      Sec.check_osstatus(status)
      CF::Base.new(out.read_pointer).release_on_gc
    end
def keychain
      out = FFI::MemoryPointer.new :pointer
      status = Sec.SecKeychainItemCopyKeychain(self,out)
      Sec.check_osstatus(status)
      CF::Base.new(out.read_pointer).release_on_gc
    end
Returns the keychain the item is in

 @return [Keychain::Keychain]