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

/**
         * Mipmap mode of the texture, affects downscaled images
         *
         * @member {PIXI.MIPMAP_MODES}
         * @default PIXI.settings.MIPMAP_TEXTURES
         */
        this.mipmap = mipmap !== undefined ? mipmap : settings.MIPMAP_TEXTURES;

        /**
         * Anisotropic filtering level of texture
         *
         * @member {number}
         * @default PIXI.settings.ANISOTROPIC_LEVEL
         */
        this.anisotropicLevel = anisotropicLevel !== undefined ? anisotropicLevel : settings.ANISOTROPIC_LEVEL;

        /**
         * How the texture wraps
         * @member {number}
         */
        this.wrapMode = wrapMode || settings.WRAP_MODE;

        /**
         * The scale mode to apply when scaling this texture
         *
         * @member {PIXI.SCALE_MODES}
         * @default PIXI.settings.SCALE_MODE
         */
        this.scaleMode = scaleMode !== undefined ? scaleMode : settings.SCALE_MODE;

        /**