How do I add a header to a ResourceList component?

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I would like to build a UI similar to the orders admin page. It seems the ResourceList component is the right component for this.  I can't seem to find out how I can add a header in the same way as the current Order Admin page (shown below).  I understand how the filters and actions are added but not how arbitrary text can be placed in the header such as the column headers.   I see there is a property called showHeader but it is not clear what this does or where the header is defined.


Thanks in advance!


Screen Shot 2020-09-21 at 3.55.17 PM.png