Use action to cast any spell as only used bunus action to maintain?

@JeremyECrawford Use bonus action to maintain or redirect Sunbeam. Use action to cast any spell as only used bunus action to maintain?

— Carmine (@nirvanstryder) April 13, 2016

On bonus actions granted by spells, see the Sage Advice Compendium: https://t.co/OvZ48vezk9 #DnD https://t.co/2w8FVEaB0g

— Jeremy Crawford (@JeremyECrawford) April 20, 2016