code: function ValueToProtocolValue_(value, mirror_serializer) {
    // Format the value based on its type.
    var json;
    switch (typeof value) {
      case 'object':
        if (value instanceof Mirror) {
          json = mirror_serializer.serializeValue(value);
        } else if (IS_ARRAY(value)){
          json = ArrayToProtocolArray_(value, mirror_serializer);
        } else {
          json = ObjectToProtocolObject_(value, mirror_serializer);
        }
        break;
  
      case 'boolean':
      case 'string':
      case 'number':
        json = value;
        break;
  
      default:
        json = null;
    }
    return json;
  }
docs: Convert a value to its debugger protocol representation.
  @param {*} value The value to format as protocol value.
  @param {MirrorSerializer} mirror_serializer The serializer to use if any
  mirror objects are encountered.
  @return {*} Protocol value.