message: Updated api files.
diff: @@ -1998,6 +1998,8 @@ export namespace IModelJsNative {
  // (undocumented)
  applyChangeSets(changeSets: string, processOptions: ChangeSetApplyOption): ChangeSetStatus;
  // (undocumented)
  + applyChangeSetsAsync(callback: (status: ChangeSetStatus) => void, dbname: string, dbGuid: GuidString, changeSetTokens: string, applyOption: ChangeSetApplyOption): void;
  + // (undocumented)
  attachChangeCache(changeCachePath: string): DbResult;
  // (undocumented)
  beginMultiTxnOperation(): DbResult;
  @@ -2102,6 +2104,8 @@ export namespace IModelJsNative {
  // (undocumented)
  hasFatalTxnError(): boolean;
  // (undocumented)
  + hasSavedChanges(): boolean;
  + // (undocumented)
  hasUnsavedChanges(): boolean;
  // (undocumented)
  importFunctionalSchema(): DbResult;
  @@ -2124,6 +2128,8 @@ export namespace IModelJsNative {
  // (undocumented)
  isOpen(): boolean;
  // (undocumented)
  + isReadonly(): boolean;
  + // (undocumented)
  isRedoPossible(): boolean;
  // (undocumented)
  isTxnIdValid(txnId: TxnIdString): boolean;
  