public void setIsImmutable(Boolean isImmutable) {
        this.isImmutable = isImmutable;
    }
<p>
Whether the attribute is mutable or not.
</p>

@param isImmutable
       Whether the attribute is mutable or not.
aws-java-sdk-clouddirectory/src/main/java/com/amazonaws/services/clouddirectory/model/TypedLinkAttributeDefinition.java