How to use the @pixi/settings.settings.ROUND_PIXELS function in @pixi/settings

constructor(system, options)
    {
        super();

        // Add the default render options
        options = Object.assign({}, settings.RENDER_OPTIONS, options);

        // Deprecation notice for renderer roundPixels option
        if (options.roundPixels)
        {
            settings.ROUND_PIXELS = options.roundPixels;
            deprecation('5.0.0', 'Renderer roundPixels option is deprecated, please use PIXI.settings.ROUND_PIXELS', 2);
        }

        /**
         * The supplied constructor options.
         *
         * @member {Object}
         * @readOnly
         */
        this.options = options;

        /**
         * The type of the renderer.
         *
         * @member {number}
         * @default PIXI.RENDERER_TYPE.UNKNOWN

*/
        this.vertexDirty = 0;

        this._transformID = -1;

        // Inherited from DisplayMode, set defaults
        this.tint = 0xFFFFFF;
        this.blendMode = BLEND_MODES.NORMAL;

        /**
         * Internal roundPixels field
         *
         * @member {boolean}
         * @private
         */
        this._roundPixels = settings.ROUND_PIXELS;

        /**
         * Batched UV's are cached for atlas textures
         * @member {PIXI.MeshBatchUvs}
         * @private
         */
        this.batchUvs = null;
    }

*/
        this.pluginName = 'batch';

        /**
         * used to fast check if a sprite is.. a sprite!
         * @member {boolean}
         */
        this.isSprite = true;

        /**
         * Internal roundPixels field
         *
         * @member {boolean}
         * @private
         */
        this._roundPixels = settings.ROUND_PIXELS;
    }

* The dirty state of this object.
         *
         * @member {boolean}
         */
        this.dirty = false;

        /**
         * If true PixiJS will Math.floor() x/y values when rendering, stopping pixel interpolation.
         * Advantages can include sharper image quality (like text) and faster rendering on canvas.
         * The main disadvantage is movement of objects may appear less smooth.
         * To set the global default, change {@link PIXI.settings.ROUND_PIXELS}
         *
         * @member {boolean}
         * @default false
         */
        this.roundPixels = settings.ROUND_PIXELS;

        this.updateText();
    }