docs: boolean isResumable()
      {
      	if (tc.isEntryEnabled()) Tr.entry(tc, "isResumable");
          
          boolean isResumable = true;
          
          synchronized(_tokenMap)
          {
              if (!_tokenMap.isEmpty())
              {
              	isResumable = false;
              }
          }
          
          if (tc.isEntryEnabled()) Tr.exit(tc, "isResumable", new Boolean(isResumable));
          
          return isResumable;
      }