I have a content snap that provides a bunch of libraries for other snaps to consume and build upon. This one builds fine with a core20 base. However, the consumer snap requires a core18 base at the moment, since the gnome extensions are not yet available for core20.
is it advisable to use a snap with a core20 base as a build/stage snap within a core18-based snap? (The content snap takes hours to build, and like most developers, I don’t like weird runtime failure surprises 
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