Insert a Group of data - feature request

No files, tests, or entry points are named. Start by examining the library's public API and its XML handling for calculated fields or categorical bins. Done means users can create a grouped column with multiple named bins and values without editing workbook XML manually.

I've got a strong use-case for the ability to insert a group of a particular column of my data. There does not appear to be a way to do this currently other than hacking the XML. This would enable an easy way to interactively redraw Sales Territory borders, but starting with the current territories rather than a blank slate.

Something like this:

  <column datatype="string" name="[Cust Group by Territory]" role="dimension" type="nominal">
    <calculation class="categorical-bin" column="[Customer ID]" default="&quot;Other&quot;" new-bin="true">
      <bin default-name="false" value="&quot;NorthNYC&quot;">
        <value>"34942825"</value>
        <value>"93347600"</value>
        </bin>
      <bin default-name="false" value="&quot;SouthNYC&quot;">
        <value>"34944166"</value>
        <value>"34941834"</value>
        <value>"52386700"</value>
        </bin>
      </calculation>
    </column>