code: function propertyGetTimeValues(properties, currentTime) {
    // properties itself may be a time-varying "property" with a getValue function.
    // If not, check each of its properties for a getValue function; if it exists, use it to get the current value.
    if (!defined(properties)) {
      return;
    }
    var result = {};
    if (typeof properties.getValue === "function") {
      return properties.getValue(currentTime);
    }
    for (var key in properties) {
      if (properties.hasOwnProperty(key)) {
        if (properties[key] && typeof properties[key].getValue === "function") {
          result[key] = properties[key].getValue(currentTime);
        } else {
          result[key] = properties[key];
        }
      }
    }
    return result;
  }
docs: Gets the values from a Entity's properties object for the time on the current clock.
  
  @param properties An entity's property object
  @param {JulianDate} currentTime The current time if it is a time varying catalog item.
  @returns {Object} a simple key-value object of properties.