Method contains

src/main/java/groovy/lang/ObjectRange.java:420–430

Iterates over all values and returns true if one value matches. @see #containsWithinBounds(Object)

(Object value)

     * @see #containsWithinBounds(Object)
     */
    @Override
    public boolean contains(Object value) {
        final Iterator<Comparable> iter = new StepIterator(this, 1);
        if (value == null) {
            return false;
        }
        while (iter.hasNext()) {
            if (DefaultTypeTransformation.compareEqual(value, iter.next())) return true;
        }
        return false;
    }

    /**
     * {@inheritDoc}