ResearchBenchITab.xml

<?xml version="1.0" encoding="utf-8"?>
<Patch>
  <!-- Add inspectorTabs if there are no inspectorTabs yet. -->
  <!-- Add ResearchInfo.RI_ITab either way -->
  <Operation Class="PatchOperationConditional">
    <xpath>/Defs/ThingDef[thingClass="Building_ResearchBench"]/inspectorTabs</xpath>
    <nomatch Class="PatchOperationAdd">
      <xpath>/Defs/ThingDef[thingClass="Building_ResearchBench"]</xpath>
      <value>
        <inspectorTabs>
          <li>ResearchInfo.RI_ITab</li>
        </inspectorTabs>
      </value>
    </nomatch>
    <match Class="PatchOperationAdd">
      <xpath>/Defs/ThingDef[thingClass="Building_ResearchBench"]/inspectorTabs</xpath>
      <value>
        <li>ResearchInfo.RI_ITab</li>
      </value>
    </match>
  </Operation>
</Patch>