public DatasetMetadata withColumns(TopicColumn... columns) {
        if (this.columns == null) {
            setColumns(new java.util.ArrayList<TopicColumn>(columns.length));
        }
        for (TopicColumn ele : columns) {
            this.columns.add(ele);
        }
        return this;
    }
<p>
The list of column definitions.
</p>
<p>
<b>NOTE:</b> This method appends the values to the existing list (if any). Use
{@link #setColumns(java.util.Collection)} or {@link #withColumns(java.util.Collection)} if you want to override
the existing values.
</p>

@param columns
       The list of column definitions.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-quicksight/src/main/java/com/amazonaws/services/quicksight/model/DatasetMetadata.java