Usage of ClassLoader.setSigners() method

Hi, everybody.
I was looking through javadoc for java.lang.ClassLoader class and caught sigh of setSigners(Class class, Object[] signers). This mysterious method which has no usage withing Java SE made me interested as I am investigating possibilities of this class and want to know something about the method. Javadoc says nothing about it. Does anybody have info about the method?
Thanks in advance.

Has to do with security and signing jars/classes. See Secure Code and File Exchanges