code: static void require(boolean condition, String message, Object... values) {
  		if (!condition) {
  			throw new RuntimeException(String.format(message, values));
  		}
  	}
docs: Validates a condition, throwing a RuntimeException if the condition is violated.
  
  @param condition The condition.
  @param message The message for the runtime exception, with format variables as defined by
  {@link String#format(String, Object...)}.
  @param values The format arguments.