text: /*
    Various utility functions used in the math stepper
   */
  const Util = {};
  
  // Adds `value` to a list in `dict`, creating a new list if the key isn't in
  // the dictionary yet. Returns the updated dictionary.
  Util.appendToArrayInObject = function(dict, key, value) {
    if (dict[key]) {
      dict[key].push(value);
    }
    else {
      dict[key] = [value];
    }
    return dict;
  };
  
  module.exports = Util;
  