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) {
			this.viewContainerModel.setSizes(this.panes.map(view => ({ id: view.id, size: this.getPaneSize(view) })));
		}
	}