dependency injection - Help me to recognize the technique i use in this php example and naming it -

ok @ work have discovered method fetch related data / objects near awesome.

right example, have class related objects inside:

class country {  private $language; //$language object of class language private $regions; //$regions array of region objects  //in constructor don't load regions or language  //magic method     public function __get($name) {          $fn_name = 'get_' . $name;          if (method_exists($this, $fn_name)) {             return $this->$fn_name();         } else {             if (property_exists($this, $name))                 return $this->$name;         }          return $this->$name;     }      public function get_language () {          if (is_object($this->language)) return $this->language;          $this->language = new language($params); //example          return $this->language;     }      public function get_regions () {          if (is_array($this->regions)) return $this->regions;          $this->regions = array();          $this->regions[] = new region('fake');         $this->regions[] = new region('fake2');          return $this->regions;     } } 

so idea is:

i want instance of country, dont need language , regions now.

in case need them, claim them properties, , magic method retrieves them me first time.

$country = new country();  echo "language is". $country->language->name;  echo "this country has ". sizeof($country->regions)." regions"; 

this on-demand method (that avoids nested loop of related objects too) has name? maybe lazy loading properties? on-demand properties?

in case need them, [...] retrieves them me only first time.

initialize proper wording. called lazy initialization.

http://en.wikipedia.org/wiki/lazy_initialization

so claim them properties, , magic method retrieves them

this called overloading of properties.

http://php.net/__get

edit:

i don't think there's term combination of two. can combine both , "lazy initialization of properties through overloading".