code: public void setImportMethods(Object[] importMethods) {
          for (Object function : importMethods) {
              if (function instanceof Class) {
                  this.functions.put((Class<?>) function, function);
              } else {
                  this.functions.put(function.getClass(), function);
              }
          }
      }
docs: httl.properties: import.methods=java.lang.Math