cancelCheckout() this method cancels the check-out of a
working copy document.
The working copy is deleted and any changes made to it are lost.
Note: This method can
only be called on a working copy node. Any reference to this working copy node should be
discarded.
Returns
Returns the original node that was previously checked out.
Example
var workingCopy;
var node = companyhome.childByNamePath("TEST_FILE_1.TXT");
node.ensureVersioningEnabled(true, true);
if (node.isVersioned){
workingCopy = node.checkout();
workingCopy.content = "Add some content.";
// changed mind
node = workingCopy.cancelCheckout();
}