public String getUnit() {
        return this.unit;
    }
<p>
The unit of time used by the <code>Value</code> parameter to determine if a file can be released, based on when
it was last accessed. <code>DAYS</code> is the only supported value. This is a required parameter.
</p>

@return The unit of time used by the <code>Value</code> parameter to determine if a file can be released, based
        on when it was last accessed. <code>DAYS</code> is the only supported value. This is a required
        parameter.
@see Unit
aws-java-sdk-fsx/src/main/java/com/amazonaws/services/fsx/model/DurationSinceLastAccess.java