_onContextRestored()
    {
        GLProgramCache.clear();
        this._initContext();
        this.onContextRestored.dispatch(this);
    }
/**
     * Called when the underlying context is restored.
     *
     * @private
     */
Called when the underlying context is restored.
@private
Called when the underlying context is restored . @private
_onContextRestored()
    {
        GLProgramCache.clear();
        this._initContext();
        this.onContextRestored.dispatch(this);
    }
_onContextRestored ( ) { GLProgramCache . clear ( ) ; this . _initContext ( ) ; this . onContextRestored . dispatch ( this ) ; }
Called when the underlying context is restored.
Called when the underlying context is restored .