public void setColumns(java.util.Collection<Column> columns) {
        if (columns == null) {
            this.columns = null;
            return;
        }

        this.columns = new java.util.ArrayList<Column>(columns);
    }
<p>
A list of the columns in the table.
</p>

@param columns
       A list of the columns in the table.
aws-java-sdk-athena/src/main/java/com/amazonaws/services/athena/model/TableMetadata.java