src/AbstractOptions.php
public function __isset($key)
    {
        $getter = 'get' . str_replace('_', '', $key);

        return method_exists($this, $getter) && null !== $this->__get($key);
    }
public function __isset($key)
    {
        $getter = 'get' . str_replace('_', '', $key);

        return method_exists($this, $getter) && null !== $this->__get($key);
    }
public function __isset ( $ key ) { $ getter = 'get' . str_replace ( '_' , '' , $ key ) ; return method_exists ( $ this , $ getter ) && null !== $ this -> __get ( $ key ) ; }
Test if a configuration property is null
@see ParameterObject::__isset()
@param string $key
@return bool
Test if a configuration property is null