static suggestions(query: string): string[] {
		const commands = ['installed', 'outdated', 'enabled', 'disabled', 'builtin', 'recommended', 'sort', 'category', 'tag', 'ext'];
		const subcommands = {
			'sort': ['installs', 'rating', 'name'],
			'category': ['"programming languages"', 'snippets', 'linters', 'themes', 'debuggers', 'formatters', 'keymaps', '"scm providers"', 'other', '"extension packs"', '"language packs"'],
			'tag': [''],
			'ext': ['']
		};

		let queryContains = (substr: string) => query.indexOf(substr) > -1;
		let hasSort = subcommands.sort.some(subcommand => queryContains(`@sort:${subcommand}`));
		let hasCategory = subcommands.category.some(subcommand => queryContains(`@category:${subcommand}`));

		return flatten(
			commands.map(command => {
				if (hasSort && command === 'sort' || hasCategory && command === 'category') {
					return [];
				}
				if (subcommands[command]) {
					return subcommands[command].map(subcommand => `@${command}:${subcommand}${subcommand === '' ? '' : ' '}`);
				}
				else {
					return [`@${command} `];
				}
			}));

	}

		.then(ranges => flatten(ranges.filter(r => Array.isArray(r))));