public void setColumnNames(java.util.Collection<String> columnNames) {
        if (columnNames == null) {
            this.columnNames = null;
            return;
        }

        this.columnNames = new java.util.ArrayList<String>(columnNames);
    }
<p>
The column names specified in the .csv file.
</p>

@param columnNames
       The column names specified in the .csv file.
@see ColumnName
aws-java-sdk-iotsitewise/src/main/java/com/amazonaws/services/iotsitewise/model/Csv.java