text: "use strict";
  
  exports.unsafeHas = function (label) {
    return function (rec) {
      return {}.hasOwnProperty.call(rec, label);
    };
  };
  
  exports.unsafeGet = function (label) {
    return function (rec) {
      return rec[label];
    };
  };
  
  exports.unsafeSet = function (label) {
    return function (value) {
      return function (rec) {
        var copy = {};
        for (var key in rec) {
          if ({}.hasOwnProperty.call(rec, key)) {
            copy[key] = rec[key];
          }
        }
        copy[label] = value;
        return copy;
      };
    };
  };
  
  exports.unsafeDelete = function (label) {
    return function (rec) {
      var copy = {};
      for (var key in rec) {
        if (key !== label && {}.hasOwnProperty.call(rec, key)) {
          copy[key] = rec[key];
        }
      }
      return copy;
    };
  };
  