Method micros

base/src/main/java/net/time4j/Duration.java:4207–4213

(int num)

         * @throws  IllegalStateException if already called
         */
        public Builder micros(int num) {

            this.microsCalled();
            this.update(num, 1000L);
            return this;

        }

        /**
         * <p>Adds a nanosecond item. </p>