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in‧ci‧den‧tal1

1 happening or existing in connection with something else that is more important :
incidental to
companies that carry out investment business that is incidental to their main activity
companies that carry out investment business that is incidental to their main activity2 [not before noun] naturally happening as a result of something
incidental to
Drinking too much is almost incidental to bartending.
Drinking too much is almost incidental to bartending.