/** Initializes an `export` statement. */
  private initializeExports(
    /** The statement to initialize. */
    statement: ExportStatement,
    /** Parent file. */
    parent: File,
    /** So far queued `export`s. */
    queuedExports: Map<File,Map<string,QueuedExport>>,
    /** So far queued `export *`s. */
    queuedExportsStar: Map<File,QueuedExportStar[]>
  ): void {
    var members = statement.members;
    if (members) { // export { foo, bar } [from "./baz"]
      for (let i = 0, k = members.length; i < k; ++i) {
        this.initializeExport(members[i], parent, statement.internalPath, queuedExports);
      }
    } else { // export * from "./baz"
      let queued: QueuedExportStar[];
      if (queuedExportsStar.has(parent)) queued = assert(queuedExportsStar.get(parent));
      else queuedExportsStar.set(parent, queued = []);
      let foreignPath = statement.internalPath!; // must be set for export *
      queued.push(new QueuedExportStar(
        foreignPath,
        foreignPath.endsWith(INDEX_SUFFIX) // strip or add index depending on what's already present
          ? foreignPath.substring(0, foreignPath.length - INDEX_SUFFIX.length)
          : foreignPath + INDEX_SUFFIX,
        assert(statement.path)
      ));
    }
  }