text: const _ = require('lodash');
  const Debug = require('../../helper/debug');
  const debugLog = new Debug('controller:predicates:has_results_at_layers');
  const stackTraceLine = require('../../helper/stackTraceLine');
  // returns a function that returns true if any result.layer is in any of the
  // supplied layers using array intersection
  
  // example usage: determining if the response contains only admin results
  
  module.exports = (layers) => {
    return (request, response) => {
      const has_results_at_layers = !_.isEmpty(
        _.intersection(
          // convert layers to an array if it isn't already one
          _.castArray(layers),
          // pull all the layer properties into an array
          _.map(response.data, _.property('layer'))
      ));
  
      debugLog.push(request, () => ({
      reply: {[layers]: has_results_at_layers},
      stack_trace: stackTraceLine()
      }));
      return has_results_at_layers;
    };
  
  };
  