docs: function(parentValue, nameIndex) {
  
                                              if (nameIndex > defaultPropertyDepth) {
                                                  defaultObserve = currentObserve;
                                                  defaultReads = currentReads;
                                                  defaultPropertyDepth = nameIndex;
                                                  defaultScope = scope;
  
                                                  defaultComputeReadings = can.__clearReading();
                                              }
                                          }