pub fn mp3_fallback(&mut self) {
        assert!(self.music.is_none() && self.sounds.is_none(),
                "cannot set mp3 fallback after audio asset packing has already started");
        self.mp3_fallback = true;
    }
/// Invoke this method to copy `.mp3` files along with `.ogg` files for audio.
///
/// This is useful when compiling to the WASM target architecture.
/// The Safari browser does not support the `.ogg` file format,
/// so `.mp3` files can be used as a fallback option.
///
/// Panics if called after calling methods to pack audio assets.
Invoke this method to copy `.mp3` files along with `.ogg` files for audio.
This is useful when compiling to the WASM target architecture.
The Safari browser does not support the `.ogg` file format,
so `.mp3` files can be used as a fallback option.

Panics if called after calling methods to pack audio assets.
Invoke this method to copy ` . mp3 ` files along with ` . ogg ` files for audio . This is useful when compiling to the WASM target architecture . The Safari browser does not support the ` . ogg ` file format so ` . mp3 ` files can be used as a fallback option . Panics if called after calling methods to pack audio assets .
pub fn mp3_fallback(&mut self) {
        assert!(self.music.is_none() && self.sounds.is_none(),
                "cannot set mp3 fallback after audio asset packing has already started");
        self.mp3_fallback = true;
    }
pub fn mp3_fallback ( & mut self ) { assert ! ( self music is_none ( ) self sounds is_none ( ) " " ) ; self . mp3_fallback = true ; }
Invoke this method to copy `.mp3` files along with `.ogg` files for audio.
Invoke this method to copy ` . mp3 ` files along with ` . ogg ` files for audio .
&mut self
&mut self