question: public boolean prescreen ( ClassContext classContext , Method method ) { BitSet bytecodeSet = classContext . getBytecodeSet ( method ) ; return bytecodeSet != null && ( bytecodeSet . get ( Constants . INVOKEINTERFACE ) || bytecodeSet . get ( Constants . INVOKEVIRTUAL ) || bytecodeSet . get ( Constants . INVOKESPECIAL ) || bytecodeSet . get ( Constants . INVOKESTATIC ) || bytecodeSet . get ( Constants . INVOKENONVIRTUAL ) ) ; }
target:  Use this to screen out methods that do not contain invocations.