text: define(function (require) {
    return function ColorUtilService(Private) {
      let _ = require('lodash');
      let mappedColors = Private(require('ui/vislib/components/color/mapped_colors'));
  
      /*
       * Accepts an array of strings or numbers that are used to create a
       * a lookup table that associates the values (key) with a hex color (value).
       * Returns a function that accepts a value (i.e. a string or number)
       * and returns a hex color associated with that value.
       */
  
      return function (arrayOfStringsOrNumbers, colorMapping) {
        colorMapping = colorMapping || {};
        if (!_.isArray(arrayOfStringsOrNumbers)) {
          throw new Error('ColorUtil expects an array');
        }
  
        arrayOfStringsOrNumbers.forEach(function (val) {
          if (!_.isString(val) && !_.isNumber(val) && !_.isUndefined(val)) {
            throw new TypeError('ColorUtil expects an array of strings, numbers, or undefined values');
          }
        });
  
        mappedColors.mapKeys(arrayOfStringsOrNumbers);
  
        return function (value) {
          return colorMapping[value] || mappedColors.get(value);
        };
      };
    };
  });
  