code: public function getCatValue($assessmentSectionId, $key)
      {
          return (isset($this->state[self::VAR_CAT]) && isset($this->state[self::VAR_CAT][$assessmentSectionId]) && isset($this->state[self::VAR_CAT][$assessmentSectionId][$key])) ? $this->state[self::VAR_CAT][$assessmentSectionId][$key] : null;
      }
docs: Gets a CAT value from the Extended State.
  @param string $assessmentSectionId
  @param string $key
  @return string