How can i change label from percentage to value - code - PieChart::create(array(

"title" => "Diversification Analysis",
"dataStore" => $this->dataStore('myTestDataStore'),
"columns" => array(
    "investortype" => array(
        "label" => "Investor Type"
    ),
    "count" => array(
        "label" => "Total",
        "type" => "number"
    )
),
"label" => array(
    "show" => true, // Whether to show the label
    "use" => "value", // i want to display value insted of percentage but it wont work
)

));

I am using Google package

This is working fine can you tell me how to apply leader lines ?

PieChart::create(array(

"title"=>"Diversification Analysis",
"dataStore" => $this->dataStore('myTestDataStore'),
"columns"=>array(
        "investortype" => array(
            "label" => "Investor Type"
        ),
        "count" => array(
            "label" => "Total",
            "type" => "number"
        )
    ),
    "options" => array(
    "pieSliceText" => "value", // Add this option
)

));