src/vs/workbench/contrib/codeEditor/browser/saveParticipants.ts/CodeActionOnSaveParticipant/createCodeActionsOnSave
class CodeActionOnSaveParticipant:	private createCodeActionsOnSave(settingItems: readonly string[]): CodeActionKind[] {
		const kinds = settingItems.map(x => new CodeActionKind(x));

		// Remove subsets
		return kinds.filter(kind => {
			return kinds.every(otherKind => otherKind.equals(kind) || !otherKind.contains(kind));
		});
	}