*   checkArgument(value >= 0, "input is negative: %s", value);
 *   // calculate square root
 * }
 * }
 *
 * <p>so that a hypothetical bad caller of this method, such as:
 *
 * {@snippet :
 * void exampleBadCaller() {
 *   double d = sqrt(-1.0);
 * }
 * }
 *
 * <p>would be flagged as having called {@code sqrt()} with an illegal argument.
 *
 * <h3>Performance</h3>
 *