Assert state, hidden or else

AssertState.php

/**
 *  @author David Wickström <davidwickstrom@gmail.com>
 */
trait AssertState
{
    /**
     *  Access any value off any object given a property with any visibility mode
     *
     * @param $field
     * @param $object
     * @return mixed
     */
    public function getField($field, $object)
	{
        if (!is_string($field)) {
            throw new InvalidArgumentException('First argument must have string type.');
        }
        if (!is_object($object)) {
            throw new InvalidArgumentException('Second argument must have object type.');
        }
        $clonedObject = clone $object;
		$reflector = new ReflectionProperty(get_class($clonedObject), $field);
		$reflector->setAccessible(true);
		return $reflector->getValue($clonedObject);
	}
	
}