nl_tokens: Use default CRS classes for common codes fallback to custom for all other codes .
pl_tokens: function ( crs , <mask> ) { switch ( crs ) { case "EPSG:3857" : return L . CRS . EPSG3857 ; case "EPSG:3395" : return L . CRS . EPSG3395 ; case "EPSG:4326" : return L . CRS . EPSG4326 ; default : return this . _defineMapCRS ( crs , options ) ; } }