def last_tag
      tag = ::FFI::MemoryPointer.new(:string)
	  proto = ::FFI::MemoryPointer.new(:int)
      Klass.getLastTag2(@handle, tag, proto)
      strPtr = tag.get_pointer(0)
      strPtr.null? ? nil : strPtr.read_string
	end
def last_tag
      tag = ::FFI::MemoryPointer.new(:string)
	  proto = ::FFI::MemoryPointer.new(:int)
      Klass.getLastTag2(@handle, tag, proto)
      strPtr = tag.get_pointer(0)
      strPtr.null? ? nil : strPtr.read_string
	end
Returns the last tag read by the reader. This may or may not still be on the reader - use {Phidgets::RFID#tag_present} to find out.

 @return [String] returns the last tag or raises an error