code: public boolean removeLastBlockVariableMap() {
  		boolean success = false;
  
  		if (testing) {
  			success = true;
  		} else {
  			if (working.size() > 0) {
  				if (working.remove(working.size() - 1) != null)
  					success = true;
  			}
  		}
  		return success;
  	}
docs: remove the last block hierarchy variable map.
  
  @return true if the last local block hierarchy could be removed else
  false