Method _onShow

src/material/tooltip/tooltip.ts:1102–1105

* Callback for when the timeout in this.show() gets completed. * This method is only needed by the mdc-tooltip, and so it is only implemented * in the mdc-tooltip, not here.

()

   * in the mdc-tooltip, not here.
   */
  protected _onShow(): void {
    this._isMultiline = this._isTooltipMultiline();
    this._markForCheck();
  }

  /** Whether the tooltip text has overflown to the next line */
  private _isTooltipMultiline() {