onBeforeShaderCompilationObservable property
      
      Observable<Engine> 
      get
      onBeforeShaderCompilationObservable
      
    
    
    
Implementation
external Observable<Engine> get onBeforeShaderCompilationObservable;
      
      set
      onBeforeShaderCompilationObservable
      (Observable<Engine>  onBeforeShaderCompilationObservable) 
      
    
    
    
Implementation
external set onBeforeShaderCompilationObservable(Observable<Engine> onBeforeShaderCompilationObservable);