public void setOperator(String operator) {
        this.operator = operator;
    }
<p>
The operator to use for the filter. Specify <code>EQ</code> when the <code>ListSlotTypes</code> operation should
return only aliases that equal the specified value. Specify <code>CO</code> when the <code>ListSlotTypes</code>
operation should return aliases that contain the specified value.
</p>

@param operator
       The operator to use for the filter. Specify <code>EQ</code> when the <code>ListSlotTypes</code> operation
       should return only aliases that equal the specified value. Specify <code>CO</code> when the
       <code>ListSlotTypes</code> operation should return aliases that contain the specified value.
@see SlotTypeFilterOperator
aws-java-sdk-lexmodelsv2/src/main/java/com/amazonaws/services/lexmodelsv2/model/SlotTypeFilter.java