normalizePath(filePath) {
        if (
            this.mix.config.publicPath &&
            filePath.startsWith(this.mix.config.publicPath)
        ) {
            filePath = filePath.substring(this.mix.config.publicPath.length);
        }
        filePath = filePath.replace(/\\/g, '/');

        if (!filePath.startsWith('/')) {
            filePath = '/' + filePath;
        }

        return filePath;
    }
Prepare the provided path for processing.

@param {string} filePath