concrete/src/Block/BlockType/Set.php
public function getPackageHandle()
    {
        $pkgID = $this->getPackageID();

        return empty($pkgID) ? false : PackageList::getHandle($pkgID);
    }
public function getPackageHandle()
    {
        $pkgID = $this->getPackageID();

        return empty($pkgID) ? false : PackageList::getHandle($pkgID);
    }
public function getPackageHandle ( ) { $ pkgID = $ this -> getPackageID ( ) ; return empty ( $ pkgID ) ? false : PackageList :: getHandle ( $ pkgID ) ; }
Get the handle of the package that defined this set.

@return string|false
Get the handle of the package that defined this set .