Tutorial-caller.tsx

//... 
public render(): React.ReactElement<ITutoTestProps> {
    let { items, columns, isCompactMode, isModalSelection } = this.state;
    return (
      <div className={styles.tutoTest}>
        <CommandBar
          items={this.getItems()} />

        <MarqueeSelection selection={this._selection}>
          <DetailsList
            items={items}
            compact={isCompactMode}
            columns={columns}
            selectionMode={isModalSelection ? SelectionMode.multiple : SelectionMode.none}
            setKey="set"
            layoutMode={DetailsListLayoutMode.justified}
            isHeaderVisible={true}
            selection={this._selection}
            selectionPreservedOnEmptyClick={true}
            onItemInvoked={this._onItemInvoked}
            enterModalSelectionOnTouch={true}
            ariaLabelForSelectionColumn="Toggle selection"
            ariaLabelForSelectAllCheckbox="Toggle selection for all items"
          />
        </MarqueeSelection>
        <Tutorial tutorial={this.getTutorial()} showReplayTutorial={true}
          replayTutorialLabel="I need some help !"
          replayTutorialLabelProps={{ className: styles.replayTutorialLink }} />
      </div>
    );
  }
  
 private getTutorial: () => ITutorial = () => {
    return tutorialScript;
  }
  //...