Test http://www.w3.org/2001/DOM-Test-Suite/level1/core/hc_documentgetimplementation

<test name='hc_documentgetimplementation' schemaLocation='http://www.w3.org/2001/DOM-Test-Suite/Level-1 dom1.xsd'>
     <metadata>
          <title>hc_documentgetimplementation</title>
          <creator>Curt Arnold</creator>
          <description> Retrieve the entire DOM document and invoke its "getImplementation()" method. If contentType="text/html", DOMImplementation.hasFeature("HTML","1.0") should be true. Otherwise, DOMImplementation.hasFeature("XML", "1.0") should be true. </description>
          <date qualifier='created'>2002-06-09</date>
          <subject resource='http://www.w3.org/TR/1998/REC-DOM-Level-1-19981001/level-one-core#ID-1B793EBA'/>
          <subject resource='http://www.w3.org/Bugs/Public/show_bug.cgi?id=245'/>
</metadata>
     <var name='doc' type='Document'/>
     <var name='docImpl' type='DOMImplementation'/>
     <var name='xmlstate' type='boolean'/>
     <var name='htmlstate' type='boolean'/>
     <load var='doc' href='hc_staff' willBeModified='false'/>
     <implementation obj='doc' var='docImpl'/>
     <hasFeature obj='docImpl' var='xmlstate' feature='"XML"' version='"1.0"'/>
     <hasFeature obj='docImpl' var='htmlstate' feature='"HTML"' version='"1.0"'/>
     <if>
          <contentType type='text/html'/>
          <assertTrue actual='htmlstate' id='supports_HTML_1.0'/>
          <else>
               <assertTrue actual='xmlstate' id='supports_XML_1.0'/>
          </else>
     </if>
</test>

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