ThreadGroupReferenceProxyImpl (ThreadGroupReference group) { DebuggerManagerThreadImpl.assertIsManagerThread(); if (group == null) { return null; } ThreadGroupReferenceProxyImpl proxy = myThreadGroups.get(group); if (proxy == null) { if (!isJ2ME()) { proxy = new ThreadGroupReferenceProxyImpl(this, group); myThreadGroups.put(group, proxy); } } return proxy; }