code: private function addCondition(PropertyInterface $property, ConditionInterface $condition)
      {
          $chain = $property->getVisibleCondition();
          if (!($chain
              && ($chain instanceof PropertyConditionChain)
              && $chain->getConjunction() == PropertyConditionChain::AND_CONJUNCTION
          )
          ) {
              if ($property->getVisibleCondition()) {
                  $previous = array($property->getVisibleCondition());
              } else {
                  $previous = array();
              }
  
              $chain = new PropertyConditionChain(
                  $previous,
                  PropertyConditionChain::AND_CONJUNCTION
              );
  
              $property->setVisibleCondition($chain);
          }
  
          $chain->addCondition($condition);
      }
docs: Add a visible condition.
  
  @param PropertyInterface  $property  The property.
  
  @param ConditionInterface $condition The condition to add.
  
  @return void