code: public static boolean isContentType(URL filename, String desiredMimeType) {
  		final ContentFileTypeMap map = ensureContentTypeManager();
  		return map.isContentType(filename, desiredMimeType);
  	}
docs: Replies if the given file is compatible with the given MIME type.
  
  @param filename is the name of the file to test.
  @param desiredMimeType is the desired MIME type.
  @return <code>true</code> if the given file has type equal to the given MIME type,
  otherwise <code>false</code>.