getImportSearches(exportSymbol, exportInfo) {
            if (!this.importTracker)
              this.importTracker = createImportTracker(this.sourceFiles, this.sourceFilesSet, this.checker, this.cancellationToken);
            return this.importTracker(exportSymbol, exportInfo, this.options.use === 2 /* Rename */);
          }
Gets every place to look for references of an exported symbols. See `ImportsResult` in `importTracker.ts` for more documentation.