"interface in org.apache.nutch.parse"><CODE>Parser</CODE></A> instance with the specified
 <code>extId</code>, representing its extension ID. If the Parser
 instance isn't found, then the function throws a
 <code>ParserNotFound</code> exception. If the function is able to find
 the <A HREF="../../../../org/apache/nutch/parse/Parser.html" title="interface in org.apache.nutch.parse"><CODE>Parser</CODE></A> in the internal <code>PARSER_CACHE</code> then it
 will return the already instantiated Parser. Otherwis