@Override
  public MethodVisitor visitMethod(
      int access, String base, String desc, String signature, String[] exceptions) {
    MethodVisitor mv = cv.visitMethod(access, base, desc, signature, exceptions);

    if (mv != null) {
      // We need to compute stackmaps (see
      // AllocationInstrumenter#instrument).  This can't really be
      // done for old bytecode that contains JSR and RET instructions.
      // So, we remove JSRs and RETs.
      JSRInlinerAdapter jsria =
          new JSRInlinerAdapter(mv, access, base, desc, signature, exceptions);
      AllocationMethodAdapter aimv =
          new AllocationMethodAdapter(jsria, recorderClass, recorderMethod);
      LocalVariablesSorter lvs = new LocalVariablesSorter(access, desc, aimv);
      aimv.lvs = lvs;
      mv = lvs;
    }
    return mv;
  }
For each method in the class being instrumented, <code>visitMethod</code> is called and the
returned MethodVisitor is used to visit the method. Note that a new MethodVisitor is
constructed for each method.
src/main/java/com/google/monitoring/runtime/instrumentation/AllocationClassAdapter.java