src/Assetter/Assetter.php
public function setDefaultGroup($defaultGroup)
    {
        list($defaultGroup) = $this->fireEvent('default-group.set', [ $defaultGroup ]);

        $this->defaultGroup = $defaultGroup;

        return $this;
    }
public function setDefaultGroup($defaultGroup)
    {
        list($defaultGroup) = $this->fireEvent('default-group.set', [ $defaultGroup ]);

        $this->defaultGroup = $defaultGroup;

        return $this;
    }
Sets default group for files.
@param string $defaultGroup
@return self