I want to ask about the meaning of a sentence.
RICHARD: Ah. Speaking of which, I’m going to give that man a call.
ALAN: Richard, you’re getting yourself all worked up.
RICHARD: As long as I’ve been with this company, it has been run by gentlemen. Revising a man’s work without so much as a phone call would’ve been unheard of!
The sentence that I don't understand is "Revising a man's work ... would've been unheard of!". I guess Richard is saying that giving a phone call is not a big deal. But I am not exactly know how to analyze the sentence. First, what does "so much as" mean here? I find two meaning for phrase. Merriam- Webster says it means "even" and Cambridge says it means "but rather". Which is more suitable here? Second, what does Richard mean when he says "would've been unheard of!"?