public static <K, V> HashMap<K, V> toMap(Iterable<Entry<K, V>> entryIter) {
		return IterUtil.toMap(entryIter);
	}
@Test
	public void toMapTest() {
		final Collection<String> keys = CollUtil.newArrayList("a", "b", "c", "d");
		final Map<String, String> map = CollUtil.toMap(keys, new HashMap<>(), (value) -> "key" + value);
		assertEquals("a", map.get("keya"));
		assertEquals("b", map.get("keyb"));
		assertEquals("c", map.get("keyc"));
		assertEquals("d", map.get("keyd"));
	}