text: class LSystemConfig {
  
      /**
       * 
       * @type {string}
       */
      axiom = ''
  
  
      /**
       * 
       * @type {Object.<string,string>}
       */
      rules = {}
  
      /**
       * 
       * @param {string} axiom 
       * @param {Object.<string,string>} rules 
       */
      constructor(axiom, rules = []) {
          this.axiom = axiom
          this.rules = rules
      }
  }
  
  /**
   * @type {LSystemConfig}
   */
  LSystemConfig.BTree = new LSystemConfig('X', {
      'X': 'F[-X][+X]'
  })
  
  
  
  export default LSystemConfig