AnalysisScope scope = AnalysisScopeReader.makeJavaBinaryAnalysisScope(classPath, exclusions); ClassHierarchy cha = ClassHierarchyFactory.make(scope); IR ir = update.getMethod().getIR(); for (SSAInstruction instruction : ir.getInstructions()) { } ClassWriter classWriter = new ClassWriter(ClassWriter.COMPUTE_FRAMES); classNode.accept(classWriter); byte[] modifiedBytecode = classWriter.toByteArray();