ctorgen.visitInsn(Opcodes.ACONST_NULL); //null meta
ctorgen.loadArgs();
ctorgen.invokeConstructor(objtype, new Method("<init>", Type.VOID_TYPE, ctorTypes));
ctorgen.returnValue();
ctorgen.endMethod();
//meta()
Method meth = Method.getMethod("clojure.lang.IPersistentMap meta()");
GeneratorAdapter gen = new GeneratorAdapter(ACC_PUBLIC,