lib/mail/ClickTracking.php
public function jsonSerialize()
    {
        return array_filter(
            [
                'enable' => $this->getEnable(),
                'enable_text' => $this->getEnableText()
            ],
            function ($value) {
                return $value !== null;
            }
        ) ?: null;
    }
public function jsonSerialize()
    {
        return array_filter(
            [
                'enable' => $this->getEnable(),
                'enable_text' => $this->getEnableText()
            ],
            function ($value) {
                return $value !== null;
            }
        ) ?: null;
    }
public function jsonSerialize ( ) { return array_filter ( [ 'enable' => $ this -> getEnable ( ) , 'enable_text' => $ this -> getEnableText ( ) ] , function ( $ value ) { return $ value !== null ; } ) ? : null ; }
Return an array representing a ClickTracking object for the Twilio SendGrid API

@return null|array
Return an array representing a ClickTracking object for the Twilio SendGrid API