public void checkForValue(final double VALUE) {
        boolean wasInSection = contains(checkedValue);
        boolean isInSection  = contains(VALUE);
        if (!wasInSection && isInSection) {
            fireSectionEvent(ENTERED_EVENT);
        } else if (wasInSection && !isInSection) {
            fireSectionEvent(LEFT_EVENT);
        }
        checkedValue = VALUE;
    }
Checks if the section contains the given value and fires an event
in case the value "entered" or "left" the section. With this one
can react if a value enters/leaves a specific region in a gauge.
@param VALUE
src/main/java/eu/hansolo/tilesfx/Section.java