Method setState

/**
 * Method to set model state variables.
 *
 * @param   string  $property  The name of the property.
 * @param   mixed   $value     The value of the property to set or null.
 *
 * @return  mixed  The previous value of the property or null if not set.
 *
 * @since   4.0.0
 */
public function setState($property, $value = null);