public String getUnit() {
        return this.unit;
    }
<p>
The precision of the timestamp value that results from the expression described in <code>value</code>.
</p>
<p>
Valid values: <code>SECONDS</code> | <code>MILLISECONDS</code> | <code>MICROSECONDS</code> |
<code>NANOSECONDS</code>. The default is <code>MILLISECONDS</code>.
</p>

@return The precision of the timestamp value that results from the expression described in <code>value</code>
        .</p>
        <p>
        Valid values: <code>SECONDS</code> | <code>MILLISECONDS</code> | <code>MICROSECONDS</code> |
        <code>NANOSECONDS</code>. The default is <code>MILLISECONDS</code>.
aws-java-sdk-iot/src/main/java/com/amazonaws/services/iot/model/TimestreamTimestamp.java