/**
* An object with members to configure various vertical axis elements. To
* specify properties of this property, create a new vAxis() object, set
* the values then pass it to this function or to the constructor.
*
* @param VerticalAxis $vAxis
* @throws InvalidConfigValue
* @return AreaChart
*/
public function vAxis(VerticalAxis $vAxis)
{
$this->addOption($vAxis->toArray('vAxis'));
return $this;
}
/**
* An object with members to configure various vertical axis elements. To
* specify properties of this property, create a new vAxis() object, set
* the values then pass it to this function or to the constructor.
*
* @param VerticalAxis $v
* @throws InvalidConfigValue
*
* @return ComboChart
*/
public function vAxis(VerticalAxis $v)
{
return $this->addOption($v->toArray(__FUNCTION__));
}