public void setRequiredBehavior(String requiredBehavior) {
        this.requiredBehavior = requiredBehavior;
    }
<p>
The required behavior of the <code>FacetAttribute</code>.
</p>

@param requiredBehavior
       The required behavior of the <code>FacetAttribute</code>.
@see RequiredAttributeBehavior
aws-java-sdk-clouddirectory/src/main/java/com/amazonaws/services/clouddirectory/model/FacetAttribute.java