Thanks for the contribution. I have not tried it yet, but the description from @Steve-Mcl looks very interesting. I am using subflows, but, sometimes it feels a bit limited... So, what you've done would be a very good addition. Now, back to your question about naming.
One of the challenge with nodered is to find the "right" flow for the job. When I go to flows.nodered.org I often use the search to help me.
So the question, is how to find your contribution through search?
"components" is not the first term that would come to my mind for searching this.
"subroutine" would... So, from a marketing point of view 
node-red-contrib-subroutine is better IMHO.
GV
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