added more functionality to the ConcurrentHashMultiMap
added more functionality to the ConcurrentHashMultiMap

mbenz89/soot,xph906/SootNew,plast-lab/soot,xph906/SootNew,anddann/soot,xph906/SootNew,plast-lab/soot,mbenz89/soot,xph906/SootNew,anddann/soot,mbenz89/soot,anddann/soot,anddann/soot,mbenz89/soot,cfallin/soot,plast-lab/soot,cfallin/soot,cfallin/soot,cfallin/soot