Function when

fdbserver/CommitProxyServer.actor.cpp:1873–1876

					// updates through the version at the time we received the request
					when(wait(commitData->version.whenAtLeast(minTenantVersion))) {}
					when(wait(futureVersionDelay)) {
						req.reply.sendError(future_version());
						return Void();
					}
				}
			}
		}