code: public void init() {
          defaultFilterVariable = "$" + filterVariable;
          defaultFormatterVariable = "$" + formatterVariable;
          if (importVariables != null && importVariables.length > 0) {
              this.importTypes = new HashMap<String, Class<?>>();
              for (String var : importVariables) {
                  int i = var.lastIndexOf(' ');
                  if (i < 0) {
                      throw new IllegalArgumentException("Illegal config import.setVariables");
                  }
                  this.importTypes.put(var.substring(i + 1), ClassUtils.forName(importPackages, var.substring(0, i)));
              }
          }
      }
docs: init.