code: public DTMIterator createDTMIterator(String xpathString,
            PrefixResolver presolver)
    {
      return m_dtmManager.createDTMIterator(xpathString, presolver);
    }
docs: Create a new <code>DTMIterator</code> based on an XPath
  <a href="http://www.w3.org/TR/xpath#NT-LocationPath>LocationPath</a> or
  a <a href="http://www.w3.org/TR/xpath#NT-UnionExpr">UnionExpr</a>.
  
  @param xpathString Must be a valid string expressing a
  <a href="http://www.w3.org/TR/xpath#NT-LocationPath>LocationPath</a> or
  a <a href="http://www.w3.org/TR/xpath#NT-UnionExpr">UnionExpr</a>.
  
  @param presolver An object that can resolve prefixes to namespace URLs.
  
  @return The newly created <code>DTMIterator</code>.