getLevelByName()

hi, parameter in getLevelByName() is folder name or level.dat name? if level.dat name so how tp get level by folder name?

i think its important that both the same... edit it with nbt editior... i got errors sometimes if both are different

i didnt get any error only player is teleported on main world if leave in this world

and i need it for bedwars so i dont need save any data from this world

with errors i mean that i had a problem. i dont mean with errors in console
sry my bad

so getLevelByName() parameter is folder name?

dont be sure, sry