src/vs/workbench/browser/parts/compositeBar.ts/CompositeBarModel/move
class CompositeBarModel:	move(compositeId: string, toCompositeId: string): boolean {

		const fromIndex = this.findIndex(compositeId);
		const toIndex = this.findIndex(toCompositeId);

		// Make sure both items are known to the model
		if (fromIndex === -1 || toIndex === -1) {
			return false;
		}

		const sourceItem = this.items.splice(fromIndex, 1)[0];
		this.items.splice(toIndex, 0, sourceItem);

		// Make sure a moved composite gets pinned
		sourceItem.pinned = true;

		return true;
	}