src/vs/workbench/services/preferences/browser/keybindingsEditorModel.ts/KeybindingItemMatches/filterAndSort
class KeybindingItemMatches:	private filterAndSort(matches: IMatch[]): IMatch[] {
		return distinct(matches, (a => a.start + '.' + a.end)).filter(match => !matches.some(m => !(m.start === match.start && m.end === match.end) && (m.start <= match.start && m.end >= match.end))).sort((a, b) => a.start - b.start);
	}