public QualificationRequirement withComparator(Comparator comparator) {
        this.comparator = comparator.toString();
        return this;
    }
<p>
The kind of comparison to make against a Qualification's value. You can compare a Qualification's value to an
IntegerValue to see if it is LessThan, LessThanOrEqualTo, GreaterThan, GreaterThanOrEqualTo, EqualTo, or
NotEqualTo the IntegerValue. You can compare it to a LocaleValue to see if it is EqualTo, or NotEqualTo the
LocaleValue. You can check to see if the value is In or NotIn a set of IntegerValue or LocaleValue values.
Lastly, a Qualification requirement can also test if a Qualification Exists or DoesNotExist in the user's
profile, regardless of its value.
</p>

@param comparator
       The kind of comparison to make against a Qualification's value. You can compare a Qualification's value to
       an IntegerValue to see if it is LessThan, LessThanOrEqualTo, GreaterThan, GreaterThanOrEqualTo, EqualTo,
       or NotEqualTo the IntegerValue. You can compare it to a LocaleValue to see if it is EqualTo, or NotEqualTo
       the LocaleValue. You can check to see if the value is In or NotIn a set of IntegerValue or LocaleValue
       values. Lastly, a Qualification requirement can also test if a Qualification Exists or DoesNotExist in the
       user's profile, regardless of its value.
@return Returns a reference to this object so that method calls can be chained together.
@see Comparator
aws-java-sdk-mechanicalturkrequester/src/main/java/com/amazonaws/services/mturk/model/QualificationRequirement.java