code: private void extractAllFeats(FgExampleList data, FactorTemplateList templates) {
          // Create a "no-op" counter.
          IFgModel counts = new IFgModel() {                        
              @Override
              public void addAfterScaling(FeatureVector fv, double multiplier) { }
              @Override
              public void add(int feat, double addend) { }
          };  
          
          // Loop over all factors in the dataset. 
          for (int i=0; i<data.size(); i++) {
              if (i % 1000 == 0) {
                  log.debug("Processing example: " + i);
              }
              LFgExample ex = data.get(i);
              FactorGraph fgLat = MarginalLogLikelihood.getFgLat(ex.getFactorGraph(), ex.getGoldConfig());
              // Create a "no-op" inferencer, which returns arbitrary marginals.
              NoOpInferencer inferencer = new NoOpInferencer(ex.getFactorGraph());   
              for (int a=0; a<ex.getFactorGraph().getNumFactors(); a++) {
                  Factor f = fgLat.getFactor(a);
                  if (f instanceof ObsFeatureCarrier && f instanceof TemplateFactor) {
                      // For each observation function extractor.
                      int t = templates.getTemplateId((TemplateFactor) f);
                      if (t != -1) {
                          ((ObsFeatureCarrier) f).getObsFeatures();                                      
                      }
                  } else {
                      // For each standard factor.  
                      f = ex.getFactorGraph().getFactor(a);
                      if (f instanceof GlobalFactor) {
                          ((GlobalFactor) f).addExpectedPartials(counts, 0, inferencer, a);
                      } else {
                          VarTensor marg = inferencer.getMarginalsForFactorId(a);
                          f.addExpectedPartials(counts, marg, 0);
                      }
                  }
              }
          }
      }
docs: Loops through all examples to create the features, thereby ensuring that the FTS are initialized.