anchor.diff:      }
   
       // These are used to do part file analysis across sources.
  +    Set<String> dartFiles = new Set<String>();
       Set<FileState> libraryFiles = new Set<FileState>();
       Set<FileState> danglingParts = new Set<FileState>();
   
  
positive.code:             // If the file cannot be analyzed, ignore it.
            }
          } else {
            var file = analysisDriver.fsState.getFileForPath(path);
  
            if (file.isPart) {
  
negative.code:           }
          }
        }
      }
  
      // We are done analyzing this batch of files.
      // The next batch should not be affected by a previous batch.
      // E.g. the same parts in both batches, but with different libraries.
      for (var path in dartFiles) {
        analysisDriver.removeFile(path);
      }
  
      // Any dangling parts still in this list were definitely dangling.
  