When the node is evaluated, it prints a string that contains the
messageString concatenated with the value of
valueNode. This then returns the value of
valueNode. Logs are printed in the JS debugger if it's attached, in console if Expo client is being used, or else in the native console. Logs are visible only in
DEV mode and have no effect on production builds. Note that
messageString should be a normal string, not an animated node.