javadoc reported this:


play/javadoc-demo/src/java.base/java/time/chrono/IsoChronology.java:673: warning: @return has already been specified
     * @return the ISO period, not null

The code shows:

    /**
     * Obtains a period for this chronology based on years, months and days.
     * <p>
     * This returns a period tied to the ISO chronology using the specified
     * years, months and days. See {@link Period} for further details.
     *
     * @param years the number of years, may be negative
     * @param months the number of years, may be negative
     * @param days the number of years, may be negative
     * @return the period in terms of this chronology, not null
     * @return the ISO period, not null
     */