docs: function parse(template, vars, options) {
      const vm = require('vm');
      template = require('./reference')(template, options);
      const sandbox = vm.createContext(vars);
      template = require('./condition')(template, sandbox, options);
      template = require('./interpo')(template, sandbox, options);
      template = require('./piping')(template, sandbox, options);
  
      return template;
  }