public function getValidatorsLocator() {
		if ($this->_validatorsLocator === null) {
			if ($this->hasLocator()) {
				$this->_validatorsLocator = $this->getLocator()->get('validatorsLocator');
				
				if (! $this->_validatorsLocator instanceof LocatorByArgumentsInterface) {
					throw new Exception('Validators\' locator must implements "LocatorByArgumentsInterface" interface');
				}
			} else {
				throw new Exception('Unable to provide validators\' locator');
			}
		}
		
		return $this->_validatorsLocator;
	}