水印

处理水印列表的类： 

 class Watermarks {
public:
Watermark item(int index); // returns a watermark with the given index
int count(); // returns a number of watermarks in the list
Watermark itemByName(string name); // returns a watermark with the given name
}

使用水印的类：

class Watermark {
public:
string name(); // returns the name of the watermark
string value(); // returns the value of the watermarks
bool blocked(); // returns the "Blocked" property
void setBlocked(bool value); // sets the "Blocked" property
}