* Determines whether the argument is a flag. Flags start with a dash "-" character, followed by at least one other non-whitespace character.

* @param arg the argument to test if its a flag

* @return {@code true} if the argument is a flag

* @see String#startsWith(String)

* @see String#trim()

* @see String#isEmpty()

* @see String#length()

*/

public static boolean isFlag(String arg) {

// TODO Fill in this method and fix the return.

return false;

}