world.playSound(pos, SoundEvents.ENTITY_PLAYER_SWIM, SoundCategory.PLAYERS, 1.0F, 1.0F);
world.playSound(pos, SoundEvents.MUSIC_MENU, SoundCategory.MUSIC, 1.0F, 1.0F, true);This code plays the main menu music at a given position using the SoundEvents enum, with the volume and pitch set to maximum and looped continuously. The package library for this method is likely to be net.minecraft.world, as it is a part of the Minecraft game engine's core classes related to the game world.