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https://stackblitz.com/edit/angular-8dwmue?file=app.component.ts
Click on 'save' button, it assigns json to this.model.
Click on 'load' button and wait few seconds, there are timeouts added so we start with fresh component(spreadsheet should dissapear and appear again).
Select D1 and press ctrl + shift + l to clean filters.
Save and load again.