code: function Sakugawa(styles, options) {
  
    if (typeof styles !== 'string') {
      throw new Error('styles must be a string');
    }
  
    if (styles.length < 1) {
      throw new Error('styles must not be empty');
    }
  
    options = options || {};
    this.maxSelectors = options.maxSelectors || 4090;
    this.maxImports = options.maxImports || 4;
    this.mediaQueries = options.mediaQueries || 'normal';
    this.filename = options.filename || 'input.css';
    this.minSheets = options.minSheets || 1;
  
    this.ast = css.parse(styles);
  }
docs: const postcss = require('postcss');