public TimestampColumn withColumnFormat(String columnFormat) {
        setColumnFormat(columnFormat);
        return this;
    }
<p>
The format of the timestamp column.
</p>

@param columnFormat
       The format of the timestamp column.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-lookoutmetrics/src/main/java/com/amazonaws/services/lookoutmetrics/model/TimestampColumn.java