public String getDifferenceType() {
        return this.differenceType;
    }
<p>
The type of property difference.
</p>
<ul>
<li>
<p>
<code>ADD</code>: A value has been added to a resource property that's an array or list data type.
</p>
</li>
<li>
<p>
<code>REMOVE</code>: The property has been removed from the current resource configuration.
</p>
</li>
<li>
<p>
<code>NOT_EQUAL</code>: The current property value differs from its expected value (as defined in the stack
template and any values specified as template parameters).
</p>
</li>
</ul>

@return The type of property difference.</p>
        <ul>
        <li>
        <p>
        <code>ADD</code>: A value has been added to a resource property that's an array or list data type.
        </p>
        </li>
        <li>
        <p>
        <code>REMOVE</code>: The property has been removed from the current resource configuration.
        </p>
        </li>
        <li>
        <p>
        <code>NOT_EQUAL</code>: The current property value differs from its expected value (as defined in the
        stack template and any values specified as template parameters).
        </p>
        </li>
@see DifferenceType
aws-java-sdk-cloudformation/src/main/java/com/amazonaws/services/cloudformation/model/PropertyDifference.java