Can Clerics and Druids pray for a minute to swap spells?

@JTtheBeardless @mikemearlsSage Advice called out not preparing all spells, but can Clerics and Druids pray for a minute to swap them? No.

— Jeremy Crawford (@JeremyECrawford) September 20, 2016

@JTtheBeardless @mikemearlsSo the minute of prayer per spell level is just for flavor? Got it, thanks! Sure thing!

— Jeremy Crawford (@JeremyECrawford) September 20, 2016