mv.visitMethodInsn(INVOKEVIRTUAL,
"java/lang/StringBuilder",
"append",
"(Ljava/lang/Object;)Ljava/lang/StringBuilder;");
mv.visitLdcInsn(" ");
mv.visitMethodInsn(INVOKEVIRTUAL,
"java/lang/StringBuilder",
"append",
"(Ljava/lang/String;)Ljava/lang/StringBuilder;");
mv.visitVarInsn(ALOAD, 0);
mv.visitFieldInsn(GETFIELD, "pkg/Outer$1", "this$0", "Lpkg/Outer;");