m.visitInsn(Constants.AALOAD);
m.visitTypeInsn(Constants.CHECKCAST, "java/lang/String");
m.visitMethodInsn(Constants.INVOKEVIRTUAL, "java/lang/String", "length", "()I");
ASMUtil.visitBoxIfNeed(m, int.class);
m.visitInsn(Constants.ARETURN);
m.visitLabel(toExcaption);
ASMUtil.visitScriptRuntimeException(m, "First argument can't be null.");
m.visitMaxs();
Class exampleClass = ASMUtil.loadClass("x.Example", clssWriter);