src/vs/workbench/browser/parts/views/viewPaneContainer.ts/ViewPaneContainer/saveViewSizes
class ViewPaneContainer:	private saveViewSizes(): void {
		// Save size only when the layout has happened
		if (this.didLayout) {
			for (const view of this.panes) {
				this.viewContainerModel.setSize(view.id, this.getPaneSize(view));
			}
		}
	}