container/services/src/main/java/org/mobicents/slee/runtime/sbbentity/ChildRelationImpl.java
@SuppressWarnings("rawtypes")
    public boolean containsAll(Collection c) {
        
    	if (c == null)
            throw new NullPointerException("null collection!");
        
        for (Iterator it = c.iterator(); it.hasNext(); ) {
            if (!contains(it.next())) {                        	
            	return false;
            }
        }
        
        if(logger.isDebugEnabled()) {
        	logger.debug("containsAll : collection = " + c + " > all in child relation");
        }
        return true;
    }
@SuppressWarnings("rawtypes")
    public boolean containsAll(Collection c) {
        
    	if (c == null)
            throw new NullPointerException("null collection!");
        
        for (Iterator it = c.iterator(); it.hasNext(); ) {
            if (!contains(it.next())) {                        	
            	return false;
            }
        }
        
        if(logger.isDebugEnabled()) {
        	logger.debug("containsAll : collection = " + c + " > all in child relation");
        }
        return true;
    }
This method returns true if all SBB entities represented by the SBB local
objects in the collection specified by the input argument are members of
this child relation. If the collection contains an object that is not an
SBB local object, an SBB local object that is invalid, or an SBB local
object whose underlying SBB entity is not a member of this child
relation, then this method returns false.