Remove a parent from the shared set. Returns the number of elements in the shared set. If this number is 0, the shared set is empty, i.e. there are no more parent items referencing this item and the state is free floating.
@param parentId parent id to remove from the shared set
@return the number of elements left in the shared set
All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.