src/vs/workbench/browser/parts/compositePart.ts/CompositePart/dispose
class CompositePart:	override dispose(): void {
		this.mapCompositeToCompositeContainer.clear();
		this.mapActionsBindingToComposite.clear();

		this.instantiatedCompositeItems.forEach(compositeItem => {
			compositeItem.composite.dispose();
			dispose(compositeItem.disposable);
		});

		this.instantiatedCompositeItems.clear();

		super.dispose();
	}