code: public void preload(Index index, String sourcesName) throws Exception {
          for (String key : index.getTestKeys()) {
              TestEntry te = index.getTest(key);
              loadExecutable(te, sourcesName);
          }
          for (String key : index.getFunctionKeys()) {
              List<FunctionEntry> functions = index.getFunctions(key);
              for (FunctionEntry fe : functions) {
                  if (!fe.isJava()) {
                      loadExecutable(fe, sourcesName);
                  }
              }
          }
      }
docs: Loads all of the XSL executables. This is a time consuming operation.
  
  @param index
  @param sourcesName
  A stylesheet reference.
  @throws Exception
  If the stylesheet fail to compile.