public function beforeUnbind($uri)
    {
        list($parentUri) = Uri\split($uri);
        $this->checkPrivileges($parentUri, '{DAV:}unbind', self::R_RECURSIVEPARENTS);
    }
public function beforeUnbind($uri)
    {
        list($parentUri) = Uri\split($uri);
        $this->checkPrivileges($parentUri, '{DAV:}unbind', self::R_RECURSIVEPARENTS);
    }
public function beforeUnbind ( $ uri ) { list ( $ parentUri ) = Uri \ split ( $ uri ) ; $ this -> checkPrivileges ( $ parentUri , '{DAV:}unbind' , self :: R_RECURSIVEPARENTS ) ; }
Triggered before a node is deleted.

This allows us to check permissions for any operation that will delete
an existing node.

@param string $uri
Triggered before a node is deleted .