code: function (node, result, cache) {
      result = ''
      // node.quantifier {}
      var count = this.quantifier(node.quantifier)
      // node.body {}
      for (var i = 0; i < count; i++) {
        result += this.gen(node.body, result, cache)
      }
      return result
    }
docs: /*
  {
  type: 'quantified',
  offset: 3,
  text: 'c*',
  body: {
  type: 'literal',
  offset: 3,
  text: 'c',
  body: 'c',
  escaped: false
  },
  quantifier: {
  type: 'quantifier',
  offset: 4,
  text: '*',
  min: 0,
  max: Infinity,
  greedy: true
  }
  }