public UpdateTableRequest withAddColumns(ColumnDefinition... addColumns) {
        if (this.addColumns == null) {
            setAddColumns(new java.util.ArrayList<ColumnDefinition>(addColumns.length));
        }
        for (ColumnDefinition ele : addColumns) {
            this.addColumns.add(ele);
        }
        return this;
    }
<p>
For each column to be added to the specified table:
</p>
<ul>
<li>
<p>
<code>name</code> - The name of the column.
</p>
</li>
<li>
<p>
<code>type</code> - An Amazon Keyspaces data type. For more information, see <a
href="https://docs.aws.amazon.com/keyspaces/latest/devguide/cql.elements.html#cql.data-types">Data types</a> in
the <i>Amazon Keyspaces Developer Guide</i>.
</p>
</li>
</ul>
<p>
<b>NOTE:</b> This method appends the values to the existing list (if any). Use
{@link #setAddColumns(java.util.Collection)} or {@link #withAddColumns(java.util.Collection)} if you want to
override the existing values.
</p>

@param addColumns
       For each column to be added to the specified table:</p>
       <ul>
       <li>
       <p>
       <code>name</code> - The name of the column.
       </p>
       </li>
       <li>
       <p>
       <code>type</code> - An Amazon Keyspaces data type. For more information, see <a
       href="https://docs.aws.amazon.com/keyspaces/latest/devguide/cql.elements.html#cql.data-types">Data
       types</a> in the <i>Amazon Keyspaces Developer Guide</i>.
       </p>
       </li>
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-keyspaces/src/main/java/com/amazonaws/services/keyspaces/model/UpdateTableRequest.java