Grid/Action/RowAction.php
public function getRouteParametersMapping($name)
    {
        return isset($this->routeParametersMapping[$name]) ? $this->routeParametersMapping[$name] : null;
    }
public function getRouteParametersMapping($name)
    {
        return isset($this->routeParametersMapping[$name]) ? $this->routeParametersMapping[$name] : null;
    }
Map the parameter.

@param string $name parameter

@return null|string