How do you get GSON to omit null or empty objects and empty arrays and lists?

I am using Gson and I am in a situation in which I have to shrink the size of certain Json strings. I would like to do so by getting it to not put null objects, only empty values, and empty lists and arrays into the Json string.

Is there a straightforward way to do that?

Let me clarify a bit: I want everything that says: emptyProp:{} or emptyArray:[] to be skipped. I want any object that only contains properties that are empty to be skipped.