public function isTypeOf($value, $context, ResolveInfo $info)
    {
        return isset($this->config['isTypeOf']) ? call_user_func(
            $this->config['isTypeOf'],
            $value,
            $context,
            $info
        ) : null;
    }
public function isTypeOf($value, $context, ResolveInfo $info)
    {
        return isset($this->config['isTypeOf']) ? call_user_func(
            $this->config['isTypeOf'],
            $value,
            $context,
            $info
        ) : null;
    }
public function isTypeOf ( $ value , $ context , ResolveInfo $ info ) { return isset ( $ this -> config [ 'isTypeOf' ] ) ? call_user_func ( $ this -> config [ 'isTypeOf' ] , $ value , $ context , $ info ) : null ; }
@param mixed[]      $value
@param mixed[]|null $context

@return bool|null
@param mixed [] $value @param mixed [] |null $context