src/vs/workbench/browser/layout.ts/Layout/setPartHidden
class Layout:	setPartHidden(hidden: boolean, part: Parts): void {
		switch (part) {
			case Parts.ACTIVITYBAR_PART:
				return this.setActivityBarHidden(hidden);
			case Parts.SIDEBAR_PART:
				return this.setSideBarHidden(hidden);
			case Parts.EDITOR_PART:
				return this.setEditorHidden(hidden);
			case Parts.BANNER_PART:
				return this.setBannerHidden(hidden);
			case Parts.AUXILIARYBAR_PART:
				return this.setAuxiliaryBarHidden(hidden);
			case Parts.PANEL_PART:
				return this.setPanelHidden(hidden);
		}
	}