use attributed defined in the same UpdateAttribute processor

[Boris Tyukin]

Hi guys,

is it possible to reuse just defined attribute in another attribute in the
same instance of UpdateAttribute processor or I really have to use two
separate UpdateAttribute processors?

For example, I define name=boris and then I want to add another attribute
greetings=Hi ${name}

If I do it in NiFi 1.9, greetings attribute is set to "Hi "