public DeltaTime withTimeExpression(String timeExpression) {
        setTimeExpression(timeExpression);
        return this;
    }
<p>
An expression by which the time of the message data might be determined. This can be the name of a timestamp
field or a SQL expression that is used to derive the time the message data was generated.
</p>

@param timeExpression
       An expression by which the time of the message data might be determined. This can be the name of a
       timestamp field or a SQL expression that is used to derive the time the message data was generated.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-iotanalytics/src/main/java/com/amazonaws/services/iotanalytics/model/DeltaTime.java