private function activateMap($mapName)
    {
        if (!isset($this->activeMaps[$mapName]))
            $this->activeMaps[$mapName] = $this->maps[$mapName];
    }
private function activateMap($mapName)
    {
        if (!isset($this->activeMaps[$mapName]))
            $this->activeMaps[$mapName] = $this->maps[$mapName];
    }
private function activateMap ( $ mapName ) { if ( ! isset ( $ this -> activeMaps [ $ mapName ] ) ) $ this -> activeMaps [ $ mapName ] = $ this -> maps [ $ mapName ] ; }
Put a map to the activate map array

@param string $mapName
Put a map to the activate map array