How to use the @pixi/utils.sign function in @pixi/utils

_onTextureUpdate()
    {
        this._textureID = -1;
        this._textureTrimmedID = -1;
        this._cachedTint = 0xFFFFFF;

        // so if _width is 0 then width was not set..
        if (this._width)
        {
            this.scale.x = sign(this.scale.x) * this._width / this._texture.orig.width;
        }

        if (this._height)
        {
            this.scale.y = sign(this.scale.y) * this._height / this._texture.orig.height;
        }
    }

set height(value) // eslint-disable-line require-jsdoc
    {
        this.updateText(true);

        const s = sign(this.scale.y) || 1;

        this.scale.y = s * value / this._texture.orig.height;
        this._height = value;
    }

_onTextureUpdate()
    {
        this._textureID = -1;
        this._textureTrimmedID = -1;
        this._cachedTint = 0xFFFFFF;

        // so if _width is 0 then width was not set..
        if (this._width)
        {
            this.scale.x = sign(this.scale.x) * this._width / this._texture.orig.width;
        }

        if (this._height)
        {
            this.scale.y = sign(this.scale.y) * this._height / this._texture.orig.height;
        }
    }

set height(value) // eslint-disable-line require-jsdoc
    {
        const s = sign(this.scale.y) || 1;

        this.scale.y = s * value / this._texture.orig.height;
        this._height = value;
    }

set width(value) // eslint-disable-line require-jsdoc
    {
        const s = sign(this.scale.x) || 1;

        this.scale.x = s * value / this._texture.orig.width;
        this._width = value;
    }

set width(value) // eslint-disable-line require-jsdoc
    {
        this.updateText(true);

        const s = sign(this.scale.x) || 1;

        this.scale.x = s * value / this._texture.orig.width;
        this._width = value;
    }

set height(value) // eslint-disable-line require-jsdoc
    {
        this.updateText(true);

        const s = sign(this.scale.y) || 1;

        this.scale.y = s * value / this._texture.orig.height;
        this._height = value;
    }

set height(value) // eslint-disable-line require-jsdoc
    {
        const s = sign(this.scale.y) || 1;

        this.scale.y = s * value / this._texture.orig.height;
        this._height = value;
    }

_onTextureUpdate()
    {
        this._textureID = -1;
        this._textureTrimmedID = -1;
        this.cachedTint = 0xFFFFFF;

        // so if _width is 0 then width was not set..
        if (this._width)
        {
            this.scale.x = sign(this.scale.x) * this._width / this._texture.orig.width;
        }

        if (this._height)
        {
            this.scale.y = sign(this.scale.y) * this._height / this._texture.orig.height;
        }
    }