Importing contents of one blueprint into another

Is there any way to import all contents of one blueprint into the other? I mean - say I have blueprint X. I want to make satellite blueprints containing elements I’d like to be a part of that blueprint so I create blueprints X_a, X_b, X_c and then somehow import them into blueprint X so that the game behaves as if all that’s in blueprints X_a, b, c was just in the main blueprint X. Is there any way to do this?

Macro and Macro library.

Play with macros first, make some input/output nodes, then create library out of them.